thanks to all those who replied. i forgot i had asked the question!!
to the gcer who asked, my daughter is finishing her freshman year of college. centaur, you've got the right daughter(i only have one)
my daughter is pretty savvy and i think that she will figure out the appropriate way to deal with this potential sticky situation. she is not dreaming that he meant his invitation as a date-he has had a crush on her since school started. i just wondered if anyone had ever come up with
the definative answer-i guess there is not one.