Ivy came to our house as a foster with her mom and four sisters. To this day if you ask mom, she will tell you she had NO intention of keeping a kitten at that time. And yet....Ivy went back to the shelter and a few days later came back to the house. She is certainly the princess of the family.
Spud was found by a neighbor of our grandparents while we were fostering Ivy and her family. Mom took him to get tested and then he joined the group. The original plan was to take him to the shelter when the other kittens went back to be adopted. Still not sure how that didn't happen.