All of ours are rescue cats. My wife used to work in a shelter on her time off and we've always been really supportive of them.
Edward's story was pretty amazing. My ex was going out to the hair salon and asked if I needed her to pick up anything on her way back. I answered, jokingly, one black kitten and one grey kitten.
When she arrived at the hair salon, there was a box in a corner with 2 kittens in it - one black and one grey. The guy who worked there had found them in the parking, abandoned. He had picked them up earlier that week in the hope that someone would adopt them, and since no one had, he was going to bring them to the SPCA the next day. Obviously, she brought them back and we took care of them. We adopted the black one and our best friend adopted the grey one from us a few weeks later.