I want to look at this issue from another angle...
As with all advice that is basically about law and process then this is the absolute worst advice here on SI... But we might be able to open some issues to discuss with a professional in your area.
It’s my understanding that upon marriage in the UK any past will might become void. If there is no mutually accepted will made then the surviving spouse get’s half of the estate, and the rest is divided equally between the spouse and surviving relatives according to some definition. So basically: If you are worth 1000 at time of death, your wife get’s 500, and 500 would be divided between her and your son – 250/250. She would end up with ¾ of the total marital estate. Note it’s not YOUR estate – but the combined estate you both have to the marriage. The key issue might be how much of the total combined marital estate is really her contribution.
In a way I get her fear. Imagine this scenario: Let’s imagine you two are living in a house you had before the marriage worth 1000. You had 1000 in savings. She sold her business for 2000. You both make comparable monthly wages/pension. You are of an age where you can afford holidays to Spain, travel to the USA and all that. You don’t have to stay at two-star dives, and can afford a nice, comfortable lifestyle. Only... that lifestyle slowly eats at both your savings. That’s fine – that’s what they are for. Money is to use and enjoy and no need to become a Scrooge to save up to your sons inheritance.
When you finally get hit on the head by that meteor you are still in the 1000 house, you might have 500 left of your savings, she might have 1000. All of a sudden, she might be dependent on the benevolence of a third party (your son) on ongoing residence, her savins (perceived) lower by a third, and the combined income from pensions/wages probably down by 60%... It’s an uncertainty I fully get would bother her.
I would be equally concerned if there wasn’t a will though... I would fear that in the above scenario the combined estate is house (1000), 500, 1000 = 2500, she get’s 12500 but has to pay your son 625. At the same time – with no will and no kids... I think your son just won the inheritance lottery as your descendant if she passes first.
This makes sense IMHO. Marriage is a union, and this ensures that a partner that has taken part in that union. Only I think that’s generally based on a lifetime of marriage rather than getting married this late.
Friend – I think the real issue is communications...
I think you should take her financial needs and concerns seriously, and the two of you discuss finances, budgeting and all that in an open and frank manner. Financial issues is the main cause of divorce, and a key factor in anxiety and stress. Budgeting isn’t ever being allowed to buy a fishing rod, it’s rather that you both know that despite the purchase, utilities are paid, food on the table and that the car will be renewed in 14 months. It’s clarity.
I also think you should mutually discuss the goal of a will, rather than the specifics.
Your goal IMHO should be twofold: the first one being that your wife is taken care of and can focus on her grief, rather than how to pay inheritance tax or sell the family home.
The second to ensure that your son has an inheritance. These two goals are IMHO equally important and have to be treated equally.
Maybe the solution would be that your wife purchase half of YOUR house. Maybe the solution is that you both agree that 2 separate savings accounts are in your separate names and not marital assets and are dealt with in a will. Maybe the solution is that assets brought to the marriage aren’t marital assets (know this can apply in UK divorce). Maybe the solution is that your wife makes your son inherit her (rather than the Chesire Cat Society).
Maybe a clause that the estate must be cleared if the surviving partner were to remarry or cohabit with another.
Maybe a clause where your son get’s the house but has a long-term tenant agreement with your widow (outlining costs and responsibilities).
I am 100% certain that your situation – where there is the possibility that your son might not inherit her since she isn’t legally related, or the situation where he could demand payment from the estate because she isn’t legally related – is a known one with solicitors. They have a known solution.
I think the key here is to get your two goals across, and to listen to her goals.
I think you would benefit personally – as well as relationship – by opening up on budgeting and financial issues.
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On a personal level: My marriage went through a rough time some years ago (some decades ago...). Part of the issue was what my wife experienced as financial uncertainty. For me it’s enough to know I have about 100 left on my account. For her she needs to know it’s 99 or 103. To work on our marriage I sat down with her and we talked openly about our incomes, our debts, our credit-cards, our goals and all that. We started budgeting and setting goals. Like the goal of paying the mortgage in 15 years instead of the 30. Our goal of saving for a holiday with our sons in 18 months.... We then sat down regularly to go over the budget. If I got leftovers for dinner, I knew we were at the amount we had budgeted for food that month...
Once you start hitting your goals... That’s when the magic happens.
I can also share that we signed a will less than 30 days ago. Basically it’s a statement that the surviving partner has the right to all the assets for their lifetime, but that if I (or she) remarry our surviving kids can demand to get paid their share.
I am certain that with fairness, honesty and openness you two can reach a solution that both are happy with.