When we were first married, my wife Jules and I moved into a tiny apartment on the third floor of a nondescript apartment building surrounded by a half dozen other nondescript apartment buildings. The U-shaped complex was safe and clean and even had a small workout facility.
From out of our windows we could look out on a central garden and across to the other half of the building.
Being newly married Jules and I were having sex quite often and being poor had not yet put curtains up on our windows. We rarely saw anyone else across the way and didn't think much about or care much about the possibility of being seen.
Jules is tall - I am six-foot three and Jules is five foot ten. We are both athletes and are in great shape. Jules also has spectacular breasts not often seen in athletic women. Heavy C cups with dark brown prominent nipples - I love them.
Apparently so did one of our neighbors. Stuffed into our mailbox one day was a photo of Jules bent over and taking my cock from behind and apparently facing directly out our bedroom window. There was no note, only a somewhat non-descriptive email address.
I wasn't sure what I was supposed to do so I sent a short note to the email address asking who they were and (jokingly) if they thought we should buy curtains. I got an immediate response saying his name was Tim and no please don't get curtains. I could tell basically what apartment they must have been in from the angle of the photo.
I figured that was the end of it until a few days later when I got another email at work.