God has a wicked sense of humor, eh? "Want to run away from the responsibility of having a child, do you??? Well, I'll show you - let's get OW pregnant too!"
Okay, I know there's nothing funny about this to you. In fact, the whole thing sucks.
Given the timing, she must have been pregnant already when you caught them together? Or do you think she arranged that time with him BECAUSE she was pregnant so she could make him think he was the father even if he wasn't? Definitely a paternity test should be done.
Have you considered sending her parents a letter, just letting them know that while you're sorry she's pregnant, she knew H was married and you were pregnant when she took up with him? I doubt her family knows the truth.
