I used to live in an apartment complex a few years back. Next to us was a Russian woman that regularly had sex with this guy. I shared a wall with her bedroom and I would fairly regularly hear her moaning and dirty-talking - even tried learning a bit of russian to understand what she was saying. I had a pen recorder at the time and I once drilled a hole in the shared wall - far below eyeline and in the corner - and I I put my pen-recorder through it and held it their during one of their love making sessions. I've kept the recording on a drive ever since. I met her several times through my mom. She was a strict-mom type personality, no-nonense and direct but also kind. She used to make us cookies and even babysat me once. She was a violin teacher I think. The guy was a fair bit younger than her, I saw him once early in the morning as he was leaving her apartment through the elevator