Bear with me on the 6 degrees of separation...
I was living with roommate (male) and dating this girl back in 03. At the time the roommate and I were sharing a computer (his), girl sends me a bunch pics over months via email. Nothing xxx-rated but they go from lingerie to full nude with her face in about 90% of them. Non-computer literate person that I am, I assume "erased" means "gone".
He moves out, she and I date for another year or so, then we split up. Fast forward a couple more years and we're talking and he admits to "finding" all these pics of her on his hard drive (I can only guess he used recovery software on them). And he's had them for years.
Best part: I haven't seen her since probably 05 or 06 however due to the area he works in, he sees her about once a month where she works. They chat and are cordial and all the time she has no idea he's seen her naked and has all these pics.
Although he hasn't tried to make a move on her (he's married now and so is she) I remember he used to mention that he thought she was hot. So my error ended up being his jackpot and an unknown ENF on her part. He's sworn never let on to her about them.
At least he ponied up and re-sent me copies
I'm just thankful I'm not in any of the pics!