If I were that girl, I'd tell her that a man with a child is like another friend to me, that I don't want children in my life, much less taking care of one that isn't mine.
There are men who throw out the bait, it's up to women to know how to respond. In fact, I would have told her, "Don't let that brat come near me, he might get my coat dirty hahaha, that guy is shameless." A woman deserves respect; there are better ways to approach a woman.
When I like a woman, I approach her, look at her and smile, one smile returns another.