Sideways Disinheritance: How Remarriage Cuts Out Your Kids

Yes, it can happen: you leave everything to your second husband, he inherits the lot outright, and years later your own children from your first marriage end up with nothing. The name for it is sideways disinheritance, and it is one of the most common ways a blended family loses money that was meant to stay in it. Nobody does anything wrong. The will is valid, your husband is not a villain, and the law works exactly as written. The money simply drifts sideways, into his family instead of yours.

It catches people because the plan sounds so reasonable. You trust each other. The idea is that whoever dies first leaves everything to the survivor, and the survivor "will see the children right" in the end. But an outright gift to your husband makes that money his, completely and without strings. What he does with it afterwards — including who he marries next and what his own will says — is entirely out of your hands the moment you die.

This article follows the money through the two deaths and the remarriage where the first family loses everything, and then sets out the two mechanisms that stop it: a life interest trust that keeps your share yours, and a life insurance payout that skips the whole chain by going straight to your children.

The chain: two deaths and one remarriage

Set it out step by step, because the trap only becomes obvious when you do.

You die first. Your will leaves everything to your second husband, outright. Because gifts between spouses are free of inheritance tax, this feels efficient, and the estate passes to him cleanly. So far, so intended. Your children are not mentioned, or are named only as a fallback if he had died before you — which he did not.

Your husband now owns the combined estate as his own money. He may fully intend to pass it to your children eventually. He might even make a new will that afternoon saying exactly that. But time passes. A few years later he meets someone, and he remarries.

The remarriage is the hinge. Under the Wills Act 1837, marriage automatically revokes an existing will unless that will was made in specific expectation of the marriage. So the will he made leaving everything to your children is torn up by operation of law — not by a decision, not by a fallout, simply because he married again. If he never gets round to writing a replacement, he dies intestate. His new wife then takes the statutory legacy and a share of the rest under the intestacy rules, and his own blood relatives take the remainder. Your children are his stepchildren, and stepchildren inherit nothing on intestacy. The money you spent a lifetime building has gone sideways to a family you never met.

Even if he does make a new will, it is now his to write as he pleases, and a new spouse and perhaps new stepchildren have entered the picture. The outcome does not depend on anyone being dishonest. It depends only on the fact that, once you died, the money stopped being yours.

Why "he will leave it back to the children" is not a plan

Couples in second marriages often rely on a spoken understanding, or on mirror wills where each leaves everything to the other and then to the children. Mirror wills feel like a safeguard. They are not, because either party can rewrite their own will the day after the first death, and the survivor's will is no longer mirrored by anyone.

There are three separate ways the promise fails, and none of them require bad faith:

• Remarriage revokes the will. As above, a new marriage cancels the existing will automatically. The protective will your husband made is simply gone.
• He changes his mind, and he is allowed to. The money is his. A new partner, a fresh set of loyalties, or ordinary drift can all lead to a new will that favours someone else. Nothing binds him to the old plan.
• His estate gets eaten before it reaches anyone. Care fees, debts, a business that fails, or a claim against his estate can all consume the fund long before your children were due to see it.

This is the same structural weakness that leaves so many families exposed under the default rules, where children inherit at 18 and nothing before, and where a household built over years turns out to rest on assumptions the law does not share. If you want the money to reach your children, the plan cannot depend on the survivor choosing to send it there. It has to be built so it goes there regardless.

The fix that keeps your share yours: a life interest trust

The cleanest legal answer to sideways disinheritance is a life interest trust, sometimes called an immediate post-death interest. Instead of leaving your share of the home and your assets to your husband outright, you leave them to a trust. Your husband becomes the life tenant: he has the right to live in the property for the rest of his life, or to receive the income from investments, for as long as he needs it. He is not put out on the street, and nothing about his day-to-day security changes.

What changes is where the capital goes at the end. When your husband dies, the trust ends and the assets pass to the people you named when you set it up — your children. Because the capital was never his to give away, his own will is irrelevant to it, and so is any later marriage. Your share reaches your children whatever he does, whoever he marries, and whatever his own estate looks like by then.

Two honest caveats. For inheritance tax, the survivor is usually treated as owning the trust assets during their lifetime, so this is a protection against the money being redirected, not primarily a tax scheme. And a life interest over a jointly owned home only works if the property is held as tenants in common, so that you each own a distinct share to leave. If you own as joint tenants, your share passes automatically to your husband on death and never reaches the trust at all — severing the joint tenancy first is the necessary step, and it is one a solicitor does routinely.

This is the same trust structure that protects a vulnerable heir elsewhere, and it sits alongside the wider planning a lone carer has to think about, which we set out in the three appointments a single parent's will has to make. For a blended family, the life interest is usually the single most important clause in the document.

The payment that skips the whole chain

The life interest fixes what happens to your share of the house and your savings. But there is a second tool that avoids the chain altogether, and it is worth understanding because it acts immediately and independently: life insurance written in trust for your children.

When a life policy is written in trust, the payout does not fall into your estate and does not pass to your husband. It goes directly to the trustees you appointed, to hold for the children you named. Your husband never touches it, his later marriage never touches it, and no claim against his estate can reach it. It is the one part of the plan that lands in your children's corner the moment you die, in cash, without waiting for anyone else's death or decisions.

For a blended family this can do the practical job the will cannot do quickly. It can equalise things between your children and any children you share with your husband. It can give your own children a sum of their own now, rather than a contingent hope of something decades away. Because it pays out fast and outside probate, it also gives them money at the point they may most need it. If you want to know what that would look like for your circumstances, you can get life insurance quotes and have an FCA-authorised broker structure the policy in trust for the children you have in mind. Level term cover is often the natural fit, because you are protecting a fixed intention rather than a shrinking debt.

Stepchildren and the harsher default

Everything above assumes there is a will. Where there is none, the position for a first family is worse still, and it is worth seeing plainly so the scale of the risk is clear.

Under the intestacy rules, stepchildren are not relatives. A child you raised for fifteen years, who called you a parent, has no claim on your estate at all unless you legally adopted them. If your husband dies without a will, his estate passes to his spouse and his blood children, and the children you brought into the marriage inherit nothing under the intestacy rules, however long the family lived as one. The same cold arithmetic applies in reverse to any children of yours in his household.

This is why a blended family cannot safely rely on the law's defaults at any stage. The intestacy rules were written for a simple, single-marriage family, and a second marriage is exactly the family shape they were never designed for. We look at the mechanics of that exclusion in more detail in the guide to why stepchildren inherit nothing under intestacy, and at the parallel problem of who can keep a child at all in whether a husband who is not the father can keep your child.

If your husband is already ill, or you are

The advice changes in tone when time is short. If one of you has a terminal diagnosis, the priority is to get a valid will and, where appropriate, a life interest trust in place quickly, and to make sure any existing life cover is actually written in trust rather than paying into the estate. A policy that pays into the estate can be swept up by the very chain you are trying to avoid.

Practical, unhurried help exists. We have written separately about sorting out your own position when your husband is terminally ill, and free guidance on wills and estates is available from MoneyHelper and Citizens Advice, neither of which will sell you anything. A solicitor who does trust and estate work will be able to sever a joint tenancy and draft a life interest trust as routine work, usually within a normal appointment or two.

Scotland and Northern Ireland

The risk exists across the UK, but the machinery differs, and it is a mistake to read English rules as if they applied everywhere.

In Scotland, children have legal rights over the moveable estate — money, investments and possessions, though not land or buildings — and a will cannot remove them. That gives your own children a claim against your estate that an English child does not have, so a Scottish parent cannot accidentally disinherit their children from moveable assets simply by leaving everything to a spouse. But legal rights only bite against your estate. They give your children nothing against your husband's estate after he inherits, so the sideways drift can still happen with the house and with anything he later owns. The Scottish equivalent of a life interest is a liferent, which does the same protective job: the survivor enjoys the property for life while the fee, the underlying ownership, is reserved for your children.

Northern Ireland broadly follows the same pattern as England and Wales — marriage revokes a will, stepchildren take nothing on intestacy, and a life interest trust works in the same way — but the intestacy figures and some procedural detail are set under its own separate rules. Wherever you live, the safe assumption is the same: an outright gift to a second spouse is a gift with no strings, and only a trust puts the strings back.

Frequently asked questions

What is sideways disinheritance?

It is what happens when everything passes to a second spouse who later remarries or makes a new will. Their estate then follows their own family or new partner, and the children of the first marriage receive nothing, even though the money originally came from their parent. No one has to act in bad faith for it to happen; the law simply treats the inherited money as the survivor's to do with as they please.

Can I leave my share to my children and still house my husband?

Yes. A life interest trust lets your spouse live in the property, or take the income, for life, with the capital passing to your children afterwards. Your share never joins your spouse's own estate, so a later remarriage cannot redirect it. For a jointly owned home this usually means holding it as tenants in common first, so there is a distinct share to leave into the trust.

Do stepchildren inherit from a step-parent?

Not under the intestacy rules, unless they were legally adopted. If your husband dies without a will his estate passes to his own relatives, and children you brought into the marriage take nothing however long they lived as part of the family. The only reliable ways to provide for stepchildren are to name them in a will or to point life cover at them directly.