The last litter my tortie had produced five kittens, only two of which looked anything alike (both were orange tabbies; one of them only lived about 12 hours). The only thing we can say about their parentage with certainty is that the black kitten must have had a black daddy. That one was female, as were all of the kittens except the two orange tabbies.
It’s possible for each kitten in a litter to be sired by a different tom. Unspayed female cats are sluts. :)
Why didn’t you ever get her fixed.