<human>: Can you condense the text into a few key points?

Sorry for wall of text.

So let me give you some back round:
Worked together for over a year. Started dating 3 months ago, one thing led to another and now we live together and feels great except for what is now happening. 

Before we started dating he was in a weird situation where he had a wife which they had no emotional/sexual attraction. They married for unneccasary reason which if I had to explain would be a gigantic wall of words. Importance was there was not suppose to be any feelings yet I was told by him was that she tried to throw her self on him multiple times but he doesn't find her physically attractive and finds her personality repulsive.

The relationship ended weeks ago. Divorced and all. So I thought no more baggage or drama. Now I'm hearing from him that he's helping her out financially since she has nothing after they divorced. My SO is a great and good hearted person. Always helping people and being the hero. He's helping start her own business kind of thing and theyr spending excessive amounts of time with her now. 

I am extremely uncomfortable with this completely. Financially I think he's helped enough. When we are together she seriously calls him at least twice. He never bothers to answer. Which makes me a little weirded out. What does he have to hide?... 

I feel like I can't bring it up since its not my place, another part of me feels like I'm overreacting. Yet I know if the table was turned he wouldn't hesitate to bring it up.. I just need some help. Should I? Or am I just being silly?...
<bot>: I feel uncomfortable with my SO excessive talking and time spent with his "ex wife". Should I bring it up or am I overreacting? Help.