I don't want to punish her or the kids for what she is done...the truth is I don't have a lot of anger towards her (of course, she also denies any infidelity of any kind but refuses to provide any proof to the contrary in the face of how bad it looks and that little bit of me not being sure one way or the other keeps the true anger at bay).
What does scare me is she is acting erratically. Unsafe driving, running at night, staying out late, hanging out with losers I wouldn't want my children around, maybe even drinking and driving...and that is just what I know of. So I don't feel 100% confident in leaving young children in her care for extended periods of time. I'd like to be there when she visits, but that in turn makes GAL and detaching a million times more difficult, so I am torn.
It sounds like you should make the best decisions for you and for your children. Sometimes being a good DAD means tough love. I am not saying to punish her but just be aware she is not the person you thought she was. She is an alien in her a body that looks like her right now.