The ex-wife and I decided to part ways. We have 2 children 15 and 9

We have a joint mortgage and she wants to stay in the home with the children whilst I have custody for 2 days a week.

I have accrued about 15k of marital debt

I am not happy with this as I don’t want my name to be associated with her and if she defaulted I am not in a financial situation to assist.

I have moved into a rental about a month ago

Spoken to a solicitor but they are saying it’s probably going to be very expensive to sort.

Anyone else been through similar that can advice on what I can do? Due to having the mortgage, I don’t seem to be entitled to much help