OP, staying in this relationship will do nothing but disempower you. He lied by omission and took away YOUR RIGHT to decide if you would even be ready to date someone with a child. You are only in love with the person you thought he was. Take this from someone who unknowingly dated a single father and found out he was a compulsive liar (surprise surprise).
Paternity test and lawyer. Record (secretly) her saying she brought up the open marriage.
have you considered that they might be escorts?
OP, staying in this relationship will do nothing but disempower you. He lied by omission and took away YOUR RIGHT to decide if you would even be ready to date someone with a child. You are only in love with the person you thought he was. Take this from someone who unknowingly dated a single father and found out he was a compulsive liar (surprise surprise).