My sister and her partner have 2 kids. She owns the family home outright but he did all of the renovation work on the house. He has made almost no financial contribution to the home in the 6 years they have been together. He is not really a house husband either as my sister still pays for childcare 2 days a week. She wants to seperate, arguments are escalating and it is affecting everyones mental health - but he doesn't want to leave. He is a good Dad and she wants this to be fair all round but without her having to sell the house just to get him to leave.