My baby and the Other Woman

[Hubnut]

I found out partner of ten years was cheating 4 weeks ago. He'd known her all of 6 weeks (I found his emails to her). I kicked him out and he's living with her. We have an 18 month old baby together. He wants access this Sunday. I'm sickened at the thought of him taking our child to see his girlfriend. I've asked him not to - he says he wont but clearly he's completely untrustworthy. This is worsened by the fact that me and this other woman exchanged a series of very unpleasant texts as I found her number on his phone. I have this fear that she might pinch him, be mean to him when his dad isn't looking just to spite me :-(

He says she's a nice person but that's not been my experience and really he's only know her for a couple of months. She does have a teenage daughter, but that doesn't qualify you as a nice person does it?

The whole situation has been a nightmare of me lurching from sad, angry, positive. I now have this anxious feeling in my stomach about possibility of this woman being with my baby.

Any help or advice?