When mum dies everything (or maybe the majority, if they want to help the kids out. Depends on what kids have now) goes to the wife. When she dies it goes to the kids and grandkids, minus whatever it costs for her to continue the lifestyle they had together. Just as it would have done in any marriage, including the previous one. All my parents and in laws are divorced and re married, and this is the arrangement they all have in varying ways, although there are fewer children involved. I’d probably leave the residences to the kids with a lifetime interest for the wife, and most of whatever income they are living on now. Some capital/assets to go to the kids, assuming this leaves the wife with a roughly equivalent lifestyle. I’d be wary of leaving the wife looking after big properties on a small income, and not able sell it.
we have (in various combinations)
A life interest. This is where I own a house lived in by a parent, but can’t do anything with it at all. They can do anything they like but sell it (unless they are selling it to live, when another comparable property must be purchased. The proceeds, if there any, are mine, but I have no say in what they buy).
However, I do not know what would happen if it needed repairs or maintenance they couldn’t afford, or if they didn’t want to live in it. They can definitely sell it and downsize to a more affordable property, but any proceeds would be mine, not theirs. They cannot be made to do so. I believe I cannot be made to maintain it. So you need to be sure there is adequate income. I doubt we’d be able to mortgage it. This is why my father-in-law left his property to his children with a life interest for his wife, and his pensions to his wife (I suspect this couldn’t be done the other way around)
You can put property (or other assets) in trust. My daughter has one from when her father died. My stepmother set up another to protect her house from being sold for care home fees. It means her property goes to my dad for his lifetime, then split between me and my daughter. She can’t access hers till she’s 21.
I plan to leave mine in partly in Trust for my daughter. She can draw an age-appropriate personal allowance and living expenses have a proportion of the income at 18, some at 21, remainder at 25. Capital to be released for driving lessons and a car, university or vocational training and travel up to a point. But other things to be funded at the discretion of the trustees. Supposing she wants to pursue a professional sports career or act or write novels or something. I’m up for her giving that a go on my dime for a year or two. I’m not up for her living a champagne Charlie lifestyle and running out of cash after a few years. Some will go into a pension for her, so she can start over at 55, if need be. I also want the money to be protected as far as possible from Cocklodgers, divorce and general scammers.
Some will go to my daughter with a life interest to a small group of people I entrust to care for her. So they can live in it and raise her, or rent it out and raise her on the proceeds, or even sell it and invest. They will also be responsible for getting together with and deciding together with whom she will live, and go to school, etc etc if anything happens to me in the next few years.