Responses
If I remember correctly she said that she woke up in her own bed, so I had a thought that maybe he just brought her into her room, but it may have been her roommate who changed her clothes. Either way I find your theory really cool, there are many situations where having your nightgown under your regular clothes would be pretty convenient, such as in this case.
Aaaaaaaa what is happening?? Hopefully the guy didn't change her clothes..