Noo... we just call them that. They could be half-sisters or cousins or both, though! Or even less directly related. We got them at the same time from the same people who had at least three litters of kittens, all different ages.. I was told they were like 7 weeks old or some BS like that when I got them. 4 weeks max from the first day I brought them home. Emma had just opened her eyes the day I first met her, and I got her a week after that.. I still think she was younger. These people had no effing clue.
Oh yes, did I mention they let a teenage girl walk in WITHOUT HER PARENTS and just walk out with two kittens without asking any questions? :yikes::yikes: Despite the fact that I did a decent job raising them.. that was not a good idea.