Just turned, and if she's pregnant enough to know she's pregnant, she was 17 when it happened.
Even if he waited for her birthday to hit it, it's still skeevy. Maybe I'm just turning into an old lady - when I was 18 I thought it would be so romantic to be involved with an older man, and that girls mature faster than boys and so of course someone older would be perfect....10 years later I can't see men in their 20's (or 30's or 40's or older) who desire a teenage girl as anything other than the most pathetic form of loser. He couldn't hack it with someone his own age, so he goes after a child. And yes, many teenage girls are intelligent, sometimes fiercely so, but they aren't at all wise. Wisdom comes from age, and realizing that you don't know anything. Wisdom is realizing that a man 7-8 years your senior, who just dumped his wife of a few months, doesn't really need your salvation or your love, just what's in your pants.
Age ain't nothing but a number once both parties can legally drink, in my opinion. Before that it's just pitiful at best and a crime at the worst.
Sorry if I sounded too snotty up there - this is one of my pet peeves. I've seen too many teenage girls throw away their lives like this on men 10-15 years older than them because they believe the bull.