Others may have better advice as to what to do, but for sure as it's your daughter, that ain't cool. Some very poor decisions from both of them, definitely don't allow him into anything you do as a family, he said he's fixed don't worry about kids, so he's in it just for sex with that comment. Of course she's probably of age to do what she wants but, poor judgement and morals from them, hopefully they end it soon.