me an my x split up in April this year after 8 years we have 2 children together 18 month an a 5 year old but were not married the house an mortgage is in my name she's never paid a penney to mortgage etc she moved out takeing all the house hold items and the family car she has £250 month csa money of me and now wants me to sell the house can she do this she's after finishing me off what rights has she got