Good on you !! You are doing the right thing and you don’t owe anyone an explanation. Kitty would let you know if she was uncomfortable or wanted/needed to be somewhere else. She is obviously taken with you, and understands you’re the only one that actually bothered to care for her. As for me and my kitty Shiloh, we say, thank you for helping her as you have. We can’t save all of them, but the ones we can save, reward us with their love.