I also found myself in a strange feline power play. Leeloo found out that being nice to me pisses Kato off, so she has been all over me this whole weekend. Kato has been somewhat annoyed with me for paying so much attention to Leeloo. Of course, every time I sit down, Leeloo jumps into my lap, which I really don't mind.
There was one moment last night (early this morning), where they were both sitting on me in peace. So it is possible.