FML..

So background. my Fiancé and I have known each other for years been together for over a year. I'm 5 mnths pregnant (off my meds for depression and anxiety) and from day one have assumed the roll of mom for his now 7yr old. We finally got all his bad habits kicked, his kid in a stable schedule, his debt paid off, etc. We've came so far and everything was near perfect.

Yesterday in the mail he received papers stating an old drunken fling is claiming he is the father of her 3 yr old. We just turned in the paperwork requesting a DNA test and now it's a waiting game.

I can't control my emotions or thoughts. I keep breaking down. I know as selfish as this sounds but I want NOTHING to do with this lady and her kid. She has slept around so much she can't remember any other possibilities. I resent them so much due to them ruining everything we worked for. I knew what I was signing up for with his son but this... I don't think I'm capable of caring for this child let alone having anything but negative feelings for her. He is scared and temperamental currently. I don't know how to help because either I can bite my tongue and destroy myself with my thoughts and feelings or I can let it all out and destroy the family I have worked so hard for.