Anyone else have a set (or a few sets) or bonded pairs? Are they related or no? Did your cat just come home one day with a boy/girl friend?

Those two are bonded. The grey one (female aka "Pretty Girl") was a feral that decided we were her people and stayed, when we moved we just took her with us (I used to live with an evil person who would have run her off/killed her) and the black/white one (male aka Castiel aka "Cas" or "Fat Boy" or "Couch Cushion") who I have raised since he was born, are the most in love cats ive ever seen. He won't go anywhere without her. She won't go anywhere without him. They won't eat unless the other is eating. He grooms her ALL THE TIME! She will body the others out of the way to get to him. And as the picture shows, they will snuggle the crap out of the other. Neither were kittens when they met, and my male is definitely well older then her(at least 10 years old, she's about 3 maybe 4) and are not related unlike his brother and sister. It's like a rom-com with these two❤️