My father always told me to never get into a car with strangers if I don't want to get kidnapped, tortured and cut into pieces and thrown away in a plastic bag like trash. It seems like I will tell my children the same story but will add the part about creating a situation in which their girlfriends will get into a car with strangers....
...Well, these kind of people prey on gullible people all the time.
'Welcome Wagon', huh. More like a mini van you pretty much don't want to go into...
Also, since we never learn what happened to that relationship, it isn't so much NTR. She was looking for them til she graduated, but she might have been completely faithful and stayed with her BF too.