Another thread has made my wonder about this. I get that if DH and I split up we would split our joint assets 50:50. However, when my DM died 10 years ago she left me a fairly substantial sum of money. We used some of this to buy a new car and some other items, but I used a chunk of it (6 figures!) to pay off our large mortgage. Our house has been enjoyed mortgage free since then which has, of course, benefitted us both over the years in that our disposable income is ours to use as we see fit, other than the usual outgoings, of course.
So, if we parted, could I claim that amount back before any joint assets were divided?