It's not an easy feat to grain a cat's trust. Many times, cats are aloof for a while before finally choosing their human. They're defensive by nature, and they're even more defensive when they have babies. To have cat moms trust their humans with their babies is an even bigger accomplishment. It's just that sometimes, even while they're still scared, cat mommas have no choice but to look for help with the human predators that scare them.
Such is the case with the cat mom that brunion has been feeding for a while. Maybe becoming a domesticated cat wouldn't have been her first choice, but in an attempt to help her babies, she went to the food-providing human anyway. It's safe to say that, now that these kitties are living in brunion's house, brunion is not the one who fostered them, the cat is the one who fostered this human.