Cheating father

darlanicole.99

In about 11 months my fiancé has cheated on me 3 times now. I just found out about the 3rd time, which started a couple weeks ago. Our son is 1 month old now. He lives with me and works, I’m a SAHM. I found some girls nudes on his phone yesterday and he said they were a models pics. Today I found messages between him and the girl, needless to say she’s not a model. She said they’ve been talking for about a weeks and she had no idea he was taken or had a child. Should I give him one last chance for our son or should I leave him? I’m really stuck...