Hi dodo
Do you have a written agreement with her about selling the house?
Are you married? Then it should be part of the separation or divorce agreement.
Your solicitor is best to advise you on all this.
There is a thread on the topic here but I am not sure that it applies to married couples.
Mary and John bought a house together. The split up years ago when the house was in deep negative equity. They were not married. There are no kids. Mary left and as far as John knows, is living abroad and not contactable. He has paid the mortgage in full since, and there is now €100k...
www.askaboutmoney.com