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Inheritance Disputes: Children vs. Second Spouse . Common Triggers and Legal Options

Son calming Inheritance Disputes between his step sister and mom.

Inheritance disputes are common in blended families.

When someone remarries, their children and new spouse can end up in conflict, especially if expectations about inheritance weren’t communicated. Whether a Will heavily favours a stepparent or intestacy rules override earlier wishes, these tensions can quickly escalate.

Here are the legal options available when disputes arise with blended families.

Inheritance disputes don’t only happen in blended families.

If you’re concerned about other causes—like Will challenges, executor issues, or claims under the Inheritance Act, check out our guide: Inheritance Disputes Explained: Causes, Risks and What Executors Can Do

Why Do These Inheritance Disputes Arise?

There are several reasons why children might contest how their parent’s estate has been handled:

  • They are unhappy with what the Will provides
  • There is no Will, and intestacy rules favour the surviving spouse
  • A previously made Will was unknowingly revoked by marriage
  • They suspect the step-parent unduly influenced their parent’s decisions

Let’s look at the main legal avenues available.

Challenging the Validity of a Will

A child might seek to challenge the Will itself. Common grounds for contesting include:

  1. The Will wasn’t validly signed or witnessed (under the Wills Act 1837)
  2. The parent lacked mental capacity when the Will was made
  3. They didn’t understand or approve the Will’s contents
  4. The Will was made under undue influence
  5. The parent was misled about other beneficiaries (fraudulent calumny)
  6. The Will was forged or fraudulent

These claims are particularly common when the step-parent inherits most or all of the estate, especially if this wasn’t anticipated or communicated during the parent’s lifetime.

Making a Claim Under the Inheritance (Provision for Family and Dependants) Act 1975

Where a Will exists—but does not provide “reasonable financial provision”—or if the estate is dealt with under intestacy, children may claim under the 1975 Act.

This legislation allows eligible individuals—including adult children—to ask the court for further financial provision from the estate. However, the needs of all beneficiaries (including the surviving spouse) are considered, and the outcome is not guaranteed.

Proprietary Estoppel: Promises Made in Life

In some cases, children may claim they were promised specific assets or inheritance during their parent’s lifetime and made decisions based on that promise—such as caring for the parent or making financial sacrifices.

If they can prove reliance and detriment, the court may award compensation from the estate, even if those promises were not included in the Will.

Final Thoughts on Inheritance Disputes

Disputes between children and a second spouse can create lasting rifts in families. But they also underline the importance of proper estate planning and clear communication during one’s lifetime.

Reduce Risk of Inheritance Disputes with Early Distribution Insurance

One of the biggest concerns for executors is the risk of Inheritance Act 1975 claims, especially if the estate is distributed too early.

Executors are expected to wait six months after the Grant of Probate or Letters of Administration before releasing funds. But this delay can create frustration for beneficiaries and pressure on executors.

Early Distribution Insurance allows executors to distribute inheritance before the six-month window closes, without taking on personal liability if a dependant later makes a claim against the estate.

Why Executors Should Consider It:

  • Faster distribution – Beneficiaries don’t have to wait the full six months.
  • Peace of mind – Protects executors, personal representatives, and beneficiaries from legal and financial risks.
  • Covers claims – Including defence costs, court-validated late claims, and awards made to successful claimants.
  • Permanent cover – Once arranged, the policy runs indefinitely with no excess to pay.
  • Affordable protection – Policies start from around £112, depending on estate size and risk factors.

This insurance is especially useful where the estate is small, simple, and has no known issues with dependants, but early distribution is needed.

It’s a practical risk management tool that helps executors fulfil their duties responsibly without unnecessary delay.


Disclaimer: This article provides general information only and should not be taken as legal advice. For personalised support, please consult a qualified probate solicitor.

Don’t Overlook the Risk of a Contentious Probate Claim, or Miss the Warning Signs

As an executor or administrator, you can be personally liable for defending claims and covering losses if you don’t have Probate Insurance, even when the claim is made against the estate, not directly against you.

Contentious probate isn’t limited to courtroom battles; it often begins with disagreements over who inherits, how the estate is handled, or whether the Will is valid.

These situations may involve someone being left out of the Will, a dispute over how much someone should receive, concerns about how the Will was created, or confusion when no Will exists. Claims under the Inheritance (Provision for Family and Dependants) Act 1975 are particularly common.

Such disputes can delay the probate process, increase costs, and expose executors to personal liability. It’s far better to identify and address potential risks early, before they escalate.

Arrange a FREE consultation with a Contentious Probate Solicitor.
They’ll assess your situation, confirm whether a claim is unlikely (which may help you qualify for Early Distribution Insurance), or provide expert guidance on how to protect both yourself and the estate.

Book Your Free Consultation

This page is based on original materials provided by IDR Law, with thanks for their permission and collaboration.

Legal Disclaimer:

This article is for general information only and should not be taken as legal advice. If you need specific guidance on probate or estate administration, please seek professional legal advice — you can find a probate solicitor here.

About the Author: Rob Faulkner

Rob Faulkner, Founder of Insuristic

Rob Faulkner is a leading expert in executor insurance risk and probate insurance, with nearly 30 years’ experience in the UK insurance market. He is the founder of Insuristic, a specialist provider of probate-related insurance solutions and educational content for executors.

Rob is an ACII Chartered Insurance Broker, a Chartered Manager, and a Member of the Chartered Institute of Marketing.   His background spans insurers, brokers, and Insurtechs, always focused on innovation, transparency, simplicity, and fair value.

He’s passionate about helping everyday people, executors, beneficiaries, and law firms choose the right probate property insurance or unoccupied home insurance, without jargon, inflated fees, or hidden commissions.

Rob is especially passionate about product development and improving insurance education through marketing, helping people understand what they are buying. These values sit at the heart of everything we do at Insuristic.

Want to learn more? Visit my author page or follow me on LinkedIn.

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