I do know that her dad has had problems with alcohol in the past.
This does seem like a trend—if I have a drink late at night, I would have it while grading (definitely need it then!), or I would have a drink while reading / relaxing in MBR. I would think that she would do similarly—have a drink while chilling in bed (even if I’m elsewhere grading or whatnot). I’m not exactly looking for evidence—it’s right there at the top of the trash can in my line of sight, and after I see it a few times, I’m starting to put it together.
I know you are correct w/r/t detachment, but it feels hard right now.