My partner's parents had a divorce 4 years ago. My partner, his sister and their father bought a house which is in all 3 names but only he and their father are paying it off. The sister contributes nothing. But recently we found a bank letter to his father addressed to "Mr and Mrs *****" which seem to be a joint bank account in which she uses locally (the father works overseas and comes back twice a year). So our concern is, if they are not divorced and he passes away, then does the wife have any claim over the house? (It's in her nature to do something like that if possible). Any help is appreciated.