About five years ago, I lived with my gf in a 2 story Townhome that shared a common wall with our female next door neighbor. The units were not very well built and the floor on the second level creeked with every step. Over a several month period, I started to notice that every time my gf left the house, the neighbor's floor would creek just on the otherside of the wall of whatever room I was in. I didn't want to just assume she was eves dropping on me, however, I did feel that my privacy was being invaded in that I was afraid to masturbate in my own bed for fear of her hearing me. After months of watching porn with no volume, or going into the bathroom to masturbate with the ceiling fan on just so I could get the comfort of privacy; I figured enough was enough and I resumed my typical routine of masturbating in bed most mornings after my gf left for work. If it was so important to her to know what I was doing, then so be it. For the next few weeks, I would make sure the pillows were against the wall each morning as I jacked myself off hard and fast; If in fact her ear was pressed against the otherside of the wall, it would be obvious to her that I was jacking off.
After about 3 weeks of jacking off "as if" I was in the privacy of my own home, the neighbor lady approached me as I was in the driveway working on my truck; "what is that noise I have been hearing lately, are you working out or something" she asked. Although I was shocked at her boldness, I did the best I could at pretending to have no clue as to watch she was talking about, however; it was obvious that she wanted me to know that she was listening to me jack off.