My brother in law has been visiting prostitutes and my sister has proof - text messages. My sister has been married for 13 years, no children. The house is in her name and until the last few months he has not contributed to bills - mortgage etc. My mum is in a care home and there is money in a joint - between her and my sister - account which pays for care home fees. My mum's house is still in my mum's name but would be left to my sister and myself. In the likely event of a divorce, what claim does he have on her money and assets? He sold a house to move in with her and still has some of that money left. He has obviously been living rent free in my sister's house. Any advice would be greatly appreciated. Thank you.