The first litter my cat had, two looked like her, all gray with a little white by the neck and white on her tummy... the other two kittens ... one was identical to his daddy... gray and white... and the other was gray, striped and white... They were all little lovers! Except the runt... who turned out to be the biggest of the kittens... I know he was the runt cause I helped her deliver them. The second and third litter yeilded kittens that looked identical to her... except for in the face where there was white... except for the one we kept from the second... he was the only surviving kitten out of three that she had and in the third only two survived out of 4. The four that passed died of Fading Kitten Syndrome... which if caught early enough can be stopped... Also one of the kittens had a "barrelled chest" (it's sort of flat but not) and that contributed to her passing... I cried... the others died with in 24 to 30 hours after being born and when everyone was asleep... we didn't know at the time that they could have possibly been saved.
Anyways... on a happy note... Your cat and those kittens are adorable! I wish I could be closer, cause I'd take one too!