She had had this litter already, but she was really hungry and looking for food and we had the front door open for some air. And she just walked in and started meowing for food, so I opened a can of tuna for her and ran off to the store to get cat food. She went back out and disappeared for a week then came back, and we fed her whenever she came around. Then one day we noticed kittens under our shed. She moved them at some point to be closer to us, then she started luring them out to us. Once we had three inside, she brought the fourth to the doorstep and dropped her at my boyfriend's feet. She spends most of her time inside with is now. Very friendly and well behaved. Doesn't scratch furniture or carpet, doesn't jump onto furniture or the counters, and is usually quiet. I'm guessing she was a housecat that got dumped outside when her owners noticed she was pregnant.