My partner & myself have 2 children (15 & 10) and I feel ready to end of awful relationship. My concern is we live in a shared ownership home & are both on the mortgage. I'm the main care giver & want to stay in the house with the kids. I don't want him with us but can't afford the bills & mortgage alone. My question is in addition to csa is he legally obliged to help with the housing costs for our children?