so since the house is unknown, the other attendees are unknown, no parents there, beer, who brought the beer, how did she get there and back home? and was there a bathroom only on the second floor? in upscale neighborhood?
I do not believe her for a second, but at that time and in that part of the country, a first floor bathroom might not have been part of a 2 story house.
Attack on the other aspects of her story.
Now could it be that she remembers these names from later contacts, possibly including sex?