Hi Lesley Ann,(posted 7405 days ago)Your ex cannot force the sale of your home until your child reaches the age of 18 or ends full-time education. If you can afford to keep paying then please do not stop as you will both be liable.
As you so rightly say he is liable for payments as it is a joint mortgage. I do hope you are claiming all the benefits you can, and that he is supporting via the CSA. If not as advised above do this straight away.
If you have equity in the property I would, if you can, sell the property offer him a settlement - after all you are in no desperate rush to move - and tell him you will give him a percentage, not half, as you have been making all of the repayments.
Make sure you do all of this through a solicitor, get yourself away from him he sounds like he's leaving a trail of destruction behind him!
Best of luck.