The crazy thing about her being under the covers is we wouldn't see anything if she wasn't, she keeps her knickers on at all times and just appears to rub the bottle against her knickers.
I think the 4 days they were away made everyone realise just how important this apartment is, with the exception of Nelly and Bogdan and maybe Paul and Leora the other apartments just create no interest!
Very weird relationship, They have fights over very trivial things and then you think their relationship is finally over, Then 1 hour later they are cuddled up like nothing happened.