You know, I was a jobless 16 year old when I found out I was going to be a daddy.
I took responsiblity and provided for my family though. I don't know how well you know this guy or how old he is, but if they are not serious, chances are he will split.
If he seems to be a good person, don't completely turn your head to them moving in. We had to do that for a while, with her parents and then mine for a bit. I think the key is to not make it too comfortable. Getting on their feet should be their first priority, but if they are comfortable how they are - they will have no drive to get on their own.
Now, this is touchy - try not to be too much of a dick... remember that if you are too hard on them(him), you could cause them problems that could cause them to split up... It took us about a year and a half to get completely out on our own. Now, mind you 90 percent of our expenses, we paid for... we even chipped in for utilities and whatnot.
If we did not have help from our parents, I do not know if we would have been able to stay together through all the challenges that being young new parents has.
Now a days, I am able to help my parents out... what goes around comes around, right?
food for thought from the other side.
I read something the other day:
"Be nice to your kids. They will chose which nursing home you go to"
Vic