re: My fiancee cheated on me.

Prayers sent. Sorry she's your baby mama. But, and I can't stress this enough, you need to cut ties with her now not later. Seriously. She's revealed her moral compass, and there's really no way you'll ever be sure she's got it properly calibrated.

Don't make her your enemy--you are sharing a child after all--but don't let the child dictate your own romantic life.

Oh, and pics or GTFO.