Buying house with daughter

I didn’t say, and should have clarified, but my daughter is married to a lovely nan and they have 2 small children. We moved towns to be near to them. We are very close, so the idea of us all being together doesn’t phase me. Looking at an annexe or similar for myself and husband.Also my husband has cancer and is on chemo most of the time, long-term prognosis unsure. So hope that makes my situation clearer, although We would all need legal advice of course.

Still same questions, OP

So sorry to hear your dh is sick

My sister moved in with her son and daughter-in-law with the full intention of building an annexe, once the sale of her house went through. Daughter-in-law started having reservations about having her m.I.l. living so near. Needless to say, my s.I.l. saw the writing on the wall, and bought a flat in a retirement complex. She is so glad and is now happy with her decision.
Your case is slightly different - son-in-laws are less combative and tend to mind their own business.

Sister-in-law

We are not qualified to advise you - well I was but am retired now and therefore can’t. What you add makes no difference, you really have to get good independent legal advice - ie don’t use the same solicitor as your daughter.

As everyone else has said, you need to get good legal advice and I'd also like to add that IMO, whatever decisions you make should first and fore most be what's best for you and your DH.

What your son and daughter may or may not inherit in the future, should be secondary.