So sure, maybe they are not dating, but they obviously are comfortable enough to sleep in the same bed together..so either they are REALLY good friends, or they aspire to date in the future..

Also, don't worry too much about the pregnancy thing. It sounds like your son is pretty responsible, and most responsible guys I know (I'm 23) would be sure to use proper protection if they were to have sex.

I doubt that they did anything. Again, it would take a lot, on both he and the girls part, to have sex while you and your wife were still home.

I'd have a talk with him, but more of an investigatory (is that even a word?) talk than a punishing lecture. Find out what the story is first, and remind him that what he did didn't sit right with you.

__________________
Dan
2005 E320 CDI - 246k
1987 300SDL TD05-16g, Herlevi pump, Elbe manifold, 2.47 LSD - 213k
Past: 1987 300D - 264k