Aww soo cute!!
If the kitten is doing fine and that the vet checked him out, then you are doing a great job raising that kitten there....I wouldn't worry about the mother cat outside, I know how spray cats are, they are scare of people since they're not around them all the time you know......
That why mostly vets put cats to sleep when they're wild because all their lives they have been living on the streets and being on their own without the people around them taking care of them....
