Oh my goodness Treese, I have no idea why you still love this man after all that BUT I know people wonder that about me - we just do I guess.I suppose we love the man they used to be or thought they were. I sometimes wonder if he ever was the man I believed him to be.
Looking at it from the "outside" I am not sure how she trapped him, she didn't get her man and she has not wanted nor got any support financially from him sooo what did she get apart from a baby.
Would a paternity test be allowed by you? not sure about your laws. In the UK unless it was court ordered by mother or said father you couldn,t get it done.
If you get D would it be worth all the added heartache.
You need to concentrate on you and your kids, you have more than enough to handle.
I really hope you and your h can reach agreement on IF,HOW or WHEN he introduce's his other son to your son. For both childern this is huge.
I wonder what the present mistress thinks of it all?
Stay calm and strong. Good luck.