Can I ask what other people have done for wills if they have remarried and children are involved?
Ex-DP and I weren't married, he had DSS, I had no DC.
We bought our house as tenant in common, 50% shares, but I paid for half with cash, he needed a mortgage. The mortgage was in joint names but we had a deed of trust saying he would always pay it (I know, legally, they could come after me if he didn't but I was comfortable with that risk). So, that was taken out of the equation.
He paid his ex-w maintenance but DSS was with us 100% of the time by the time we split up, and about 80% of the time up til then (we lived together 3 years or so).
Other than mortgage, household bills and living costs were 50/50. Even though we had a bigger house due to the DSS than we would have had just the two of us. Even though DSS used water/fuel and ate food etc.
We pooled enough resources to pay all household costs, plus some set aside for holidays and some set aside for savings generally. Ex paid £100pm extra to cover the cost of his DS. It didn't cover it, considering holidays etc, but was a token to show he knew I wasn't responsible.
On holidays we usually started with a 50/50 cost share but then he might do something like pay for all the fuel (work fuel card anyway). One time we went away with my sister and I paid for it. For example.
He paid all other child expenses such as trips, clubs, clothes etc.
Re wills - I left my half of the house to him and he left his half to me, no life interest. I made him take out life insurance equal to the then mortgage (which was about £80k) just so I didn't end up paying the mortgage when he died.
He left £20k to his DS and 50/50 each to DS and me of anything after that, plus 50/50 of his life insurances.
Had he died with this arrangement, I would have made sure DSS got more, especially from the value of the house. I know that's easy to say, but since ex and I split, I have rewritten my will and DSS is still included in it (ex is not!).
I left all my life insurances (work, pensions etc) to him, until my sister got divorced, then I changed them to be 50/50 him and my sister - not, of course, it's just my sister.
I'm a saver and self-employed and go periods of not working, I never didn't pay my own way but also not once did ex offer to support me in any way at all, despite being a pretty high earner (C£70k+) - and yet, he often said he had run out of money, whereas I never did (I earned less when I was working, c£60k, but taking account of the gaps, less).
It is really tricky with second families. My dad took on my mum who already had my sister and I can't imagine for a minute he made my mum pay all my sister's costs. Though my sister is excluded from the wills I gather!