Hi OU81232, I totally get the feelings you are going thru with the presence om with a criminal past especially being around your daughter. My W has her om with a criminal past living with my son and daughter, so I get it. Tell us more about your sitch - are you able to seek custody of your daughter?
I recommend that you go see a lawyer. You will need to pay child support, perhaps alimony/maintenance, and work out your parenting time with your daughter. If you don't deal with these things up front, it will force your WW to file court papers to get $$$ from you. Good luck.
