While reading this thread, keep in mind that Lilee is a spoiled princess girl
The other day I was cleaning out the ex-pen and removed everything. I noticed Lilee attempting to climb on top of her sister Cocoa, but thought it was just one of those annoying to Cocoa puppy things

Lilee was so persistent she made me think twice and that's when I realized she was trying to keep her body and paws off the tile floor by using Cocoa as a rug!

In the last picture you can see they're still friends