I have no idea if they're all from the same mother or what as they are 2 and 2 and I see no adult cats around other than the one across the street who is pure white and comes to visit every time I'm out in the front yard.
She seems to need affection, she is so docile, and after she has her white hair all over my pant legs I tell her 'go back home now' and off she goes...lol.