Is his ex-wife entitled to any of our income or possessions?

No, his wife does not have claims against your income or property. However, she may obtain an order and seek to enforce against his income or property. If there is jointly owned property, then you would need to obtain independent legal advice as to whether she would be entitled to his share of jointly owned property in order to realize on any judgment or award arising from the resolution of their issues from their separation. There are some issues arising from this situation, and you would be wise to obtain full independent legal advice on this issue. His wife has no claim against your income or assets, but she may have claims and rights to his income and property. If you wish to own property jointly with him, or he structures his financial arrangements to leave everything for you, then that may create issues down the road. There are certain limitation dates for her to seek to equalize the value of their properties, however she can always ask to extend those time limitations.