Yes, that is a reasonable assumption given the circumstances.
In that case, if she was not making the payments, she really should be p**ed off at her boyfriend for falling past due.
My guess is that she and her BF had a fight about this afterwards. You wonder too, what the BF does for a living that he could realistically afford such luxury vehicles.
Well, as others here have said, some dealers are very willing to give loans to those with bad credit. Maybe that’s what happened here.