Your partially right there definitely was no one outside watching the girls. That window looks out over the river and if you look closely you can see traffic go by on the bridge, to far away for anyone to see into the apartment especially when the apartment lights were off.
She really does look sexy in her new lingerie and Malia was looking pretty good too. No one tell Leora I was looking at Malia, she will get upset and kick me out of the panty drawer.
My opinion is that Leora is very meticulous about her house cleaning and would rather do it herself, I think she may also think of Malia as guest still and you don't ask guess to clean your house normally. I think as long as Malia keeps her room clean she will be OK.