Good or bad, happy or sad

OK ladies. . Here goes. I need support and or advice.

I met my fiance last year . We started off as friends and only friends for about 6-8 months. January he moved to the state I lived. It's been great. We had mostly everything in common. Mid to late 20's.. no kids. Both in school working towards our careers. So everything was great . In love.. so he sits me down one day in march and tells me "we need to talk". Ling story short, he tells me that in the previous state he was living in there was a woman who he had a short fling with.. yep u guessed it. She ended up pregnant, and he may possibly be the father. Oh n by the way.. the same day he told me was the day after he received a call from the woman stating the baby had been born. OK so here's the dilemma. I'm OK with it bc it was something that was in motion before me.. yet from March to now I was under the impression that until he knew for sure if the baby was his he was not going to be in contact with this woman. Not my words ..his. bc he didn't have the $ at the time to pay for DNA test. OK , almost done. .. today I find out that although there has been communication btwn the two. She sends him pictures..videos and keeps asking him when he will come to see his "son ". He claims he's not sure if the baby is his but his game plan is to pretend that he has no doubt (to her) in order to avoid drama from her end. He wants to go n visit the baby.. take the baby to go n get tested without her knowledge. I do not agree with his method .. I feel left out. And it hurts a Lil deeper than that bc i have trouble getting pregnant. So I feel very confused. When I asked him to just have a truthful adult conversation with her about how he feels about the situation, he blew up and accused me of trying to bring drama into all of it. Lol. But that's exactly what I was trying to avoid. Please somebody just talk to me. I have never been in this type of situation. Fyi. I have no hang ups if the baby is his. I'm kind of excited to get to know the lil guy. But it's like I can't be happy bc he doesn't ever bring it up. By him communicating with her here and there.. I feel it gives her the impression that he is on board. . But he seems to think that if he would have cut communication off until he found out that he could possibly miss out on a child that ended up being his. Lol. I have no problem with this..but in my book u can't play the fence in situations like these.. opinions????