If you got kids, don't get a divorce. Try to let it go. Kids do need their parents, even if it's her fault, the kids won't care either way. You both split, they think it's their fault.
I wouldn't say to patch things up, but tell your wife that there's more important things in her life than just "getting some." IMHO, that's being greedy, and it could cost her her own kid's childhood.
It took my best friend about 3 years to get over it after his parents got divorced. And he still can barely handle it.
Edit: I've looked back, through here, and to all of my friends, and I've never met a guy who actually cheated. *shrugs* and I've met women who say they can't trust a single man while at the same time, they're two-timing their boyfriend.