A friend of mine son has spit up with wife and she and there son are living with her mum, he is living in there home and he has put it up for sale as when they sell it after playing the mortgage back and spitting it 50 50 they should have enough left for them both to buy a small house each please could you say if he bought a house with his 50% share and never divorced her would she have any claims on the new house he will be buying with his half share.