Can my ex claim money from my new partner?

Your ex cannot directly make a financial claim against your new partner as they are not a party to the divorce proceedings. Any financial obligations and claims are only between the two people who were married. However, cohabitation with a new partner may be indirectly relevant to a divorce settlement. If you are cohabiting with your new partner, the court may consider your new partner’s income as a “resource” that reduces your financial outgoings. A court may take the view that your new partner should be contributing financially and that your expenses could be shared.