Sorry, I would have issues with this.....

He would be history for me.

Red flag, red flag, red flag. I am not suggesting guilt, however......
In my eyes, if you are into that AND ARE SINGLE then that's one thing.....if you are into that and start dating a woman with children, then your thinking should automatically change from "this is hot", to "this is disgusting". In other words, his emotion should be dictating his morals. And it's clearly not.