Community of Sexsoundlovers

I live in a house and in the neighbors house there is a daughter who’s 19. She and her boyfriend often comes home, I see they come in his car, and then a few moments later they enter her room. I use to carefully watch them with my binoculars, I can see through the window. They kiss and he use to tickle her, and it’s very hot to see. But then it gets more intense, I can see how he kiss her neck and starts to touch her under the clothes. At this moment she always, always (!) pull down the curtains so I can no longer see. Ones I saw the guy when he pulled out his duck and wanted her to touch it. He was easily 7 -7,5 inches. Really really hard and sexy dick. But then right away she pulled down the curtains now in the summer she use to let the balcony door be open though. But i have never heard any sound of sex, I think they might be quite silent. But I’m 100% sure they fuck when the curtains go down.

So to my question. I really would like to catch some audio but I can not get busted. So I will be very very careful. I’ve thought a lot about ways to record but I can’t find a way, her room is on the 2,nd floor and there’s a balcony, and the door is always open now during summer time. Problem is that I think I need to come close, because it’s a bit of a noisy area with traffic and stuff. Any technical suggestions or ideas for me?

Maybe you can hide a usb recorder down their balcony. Afterwards you can pick it up and listen with their where loud enough.

Interesting setup, sounds challenging

Any chance you can reach the balcony? If yes I'd suggest to hide the device either somewhere on floor level on the sides or front of the balcony (so it's basically "outside" and out of sight) OR if there are flower boxes or something like this, use them to cover up while still pointing to the door.