I often have more then two cat's on my lap at the coumptuer.. My big cat jerzee will be in the middle of my lap, little fart will be on top of her and then tater will curl up on one of my thighs.
So yes
They just seem to be acting more then just friends though... I mean its like Kayleh forgot how old she is and became troubles kitten and trouble became her mom.
We have a mixed calico cat kayleh who is about 5 years old. She has recently made friend's with one of our other mix's Trouble, whom has never liked anybody, not even us.
Last night Kayleh jumped up on the bed and curled up next to Trouble. Trouble allowed this, and there still doing that now...