<human>: Can you succinctly summarize the text in 1-3 sentences?

Hi reddit I'm hoping you can help me frame my thoughts in a way that doesn't make this awkward situation more awkward!

My bf and I live in a flat below another flat. The woman who lives there seems to have some sort of travelling job so she's not always there but when she is she's on holiday or something because she's always home  (maybe 2 weeks out of six or so). 

And when she is there, she likes to have a LOT of sex. Good for her and everything but it's the times she chooses that are so frustrating.

Her bed is directly above our bed so we can hear everyyything.

A typical weekend when she's home will see her playing loud music and doing nothing until about 3am then, like clockwork, having loud smashing the bed into the floor moaning like a pornstar for an hour sex at 3am. Literally bang on 3am. Sometimes it happens again at 5am but not always. 

This in itself is annoying enough but she also does it on weeknights. My bf and I both wake for 9-5 jobs and need a decent amount of sleep. Last night I got woken at 1:30 (she's less like clockwork on weeknights) and had to move to sleep on the lumpy sofa cos I just couldn't deal with lying there for an hour listening. Today I'm exhausted. 

So my question is: how can we communicate this to her? We never see her so we're thinking a note under the door asking her to at least have sex at normal hours and/or move into the living room where we cant hear, but need to avoid making that too passive aggressive and making it worse. Thoughts on wording/anyone been in a similar position would be great! :)
<bot>: our upstairs neighbour has loud sex directly above us at 2-3am on weekends and weeknights (when she's home). It's effecting our sleep. How can we politely tell her to stfu?