I'm sure its been covered, but I wasnt on here then.
The only issue would be the potential complications and problems if things got serious between you and the lady. Esp if the child is a boy, cos after a certain age simple male ego kicks in,and not being the father would surely cause resentment.
Opinions?
I've dated chicks with a kid or two. It's cute seeing an older boy call you a "mother-f**ker" and seeing his response when you say, "yeah, ask your mom". I'd never strike but I'd slap on some wrestling holds where they can't move and tell them that mom and I are dating.