That's cute! Tink is the same way. I'm pretty busy working during the day so she can't be in my lap so she demands to sit or sleep on my feet. Either on guard or sleeping. She has done this since she was a puppy and she's now 3 years old. I've gotton used to my little foot warmer.
If you got two, you'd have two little ones fighting over your lap. LOL Mine do play a lot together but they don't stay away for long.