If he paid it, this is sufficient.

I paid my zakat ul fitr by myself and for myself only even though my father is the head of the household. The reason i did this is bcause he does not pray and has cursed the deen on three or four occasions and therefore if i let him pay it on my behalf i was not sure if it was valid or accepted. I consider him to be a definite kaafir. Is what i did correct? And what should my mother and sister do? —