[Sounds like a drain on her life, really, but he's not sure how that works. It could definitely explain some things if she was up and wandering in the night without her knowledge. It's sort of creepy and sort of sad and he bites his lip carefully as he thinks of how to elaborate without...well, without sounding crazy.]

Let's just say I've got a couple of thoughts on possession and how it all works. It's hard to say how they're doing this since I've never dealt with aliens, but I'd like to be able to help prevent them from ever coming back. [Which is mostly true.] I just need to try and understand what could have happened. Most people when they're possessed are like you and they don't remember a thing. During the week, nobody said anything about maybe seeing you at strange hours of the night?