Can my ex take me for half of everything?

Basically i broke up with my ex as she cheated on me with 15+ men… Shes now sending me threatening solicitors letters to take me for half of everything and saying shell take me to court and ill have to pay the fees. Stupidly at the time i put her on the mortgage as i said if were doing it were doing it properly, she never paid a penny, and since we finished i have found out she has tried to do other men over for money, i have a few people who could go against her and say this is what person she is as well as someone to witness the cheating as if she hadnt we would still be together. Is ther anything i can do to at least minimise what i hve to pay her, if the house was in someone elses name would that make a difference or could this not be done with her been on the mortgage? I know ive made a right mess for myself! Suppose thats love for ya eh

Read more: Can my ex take me for half of everything?