I've been in the situation sorta from both ends. When I lived out in Los Angeles last year (I was 26) I met a gorgeous woman. Instant attraction. I judged her to be around my age, perhaps 27 at the most. Turns out she was 34! The two of us became instant friends and remain very close now as well. She was seeing somebody at the time, and I wasn't going to interfere with that, but we had discussed that if things wouldn't work out between her and this other guy (who was also 26!) we should give it a go. Very correct that age is only a number. A good friend of mine, when she was 17 was dating a guy who was 35, divorced with two kids. Amusingly it turned out to be she! who was the more mature of the two.
Now I'm in the opposite position. I'm 27, and the girl I'm very! seriously involved with is 18 (19 next month). I met her when I was living in LA, but we didn't become 'interested' in each other until I had moved back to Europe. And yes, I have been accused by more than one of 'robbing the cradle'. My friends and family are all very supportive (not so big a deal in Europe, heck I don't think it'd legally be a problem here as long as she's at least 16!), but her entire family seems to hate me, especially her mother who accuses me rather viciously of taking advantage of her youth and 'impressionable' innocence. But, our relationship is a genuine and committed one. That's why we continue to go through with it despite all of the flak. She is very much 'wife material'
Another example is a lady I stayed with for several months, also in LA (quite famous actually. Big celeb in Canada in the late 70s). She's 54, and her boyfriend of the past 8 years is about to turn 32
They get along great, absolutely no problem there whatsoever. It's very funny actually. During Thanksgiving, his mom came to visit, and I think she was about the same age as his girlfriend!!
My advice to you: If you two are a good match, you have a mutual attraction, and you can live with the logistics (in my case 'long distance'), and don't mind bridging the gap between you and her kids, then by all means go for it!! Continue to be relaxed about it though. It's ok to be totally passionate, but remember, relationships have a lot of ups and downs, and you don't want to let the cycles burn you out. Best of luck!!!