when i was 21, i dated a 32 year old woman with 3 kids for 4 months. it was actually a very rewarding relationship and I learned a LOT about relationships and the family dynamic. Apparently her kids were a little too comfortable with me though, one of them called me "dad" one day. That was the last time I saw her, it was too much for me. I never called her again or returned her phonecalls. I found out later that one of my friends told her what scared me away and she said that she "could see it."
So my advice is go for it, bang her like a screen door in the wind. If she's got kids though, run the fuck away. I'll never ever date a girl with kids ever again.