Eh.. I'm shocked you stuck around that long. Sounds like you have raised some good kids, and loved them like your own..

I'm guessing she is 58 now?

Hell, at 48, you can probably re marry, have kids of your own, and have the marriage you had hoped that one would be.

Or just trade her in for 2 29 year olds. lol..

Divorce sucks, no matter the circumstances, but sounds like it's a win situation for you in the long run.