Double the Trouble

To help out Katherine and Josh while they adjust to having Marina around, I brought Roman to our house for a couple of weeks. To give him a change of scenery, Peter and Kendall thought he'd like to sleepover with Lucy this weekend. These two have always been cute together, but now that they are a little older, they wrestle less and adventure more. Kendall sent me this photo of them looking out the window together while she was folding laundry in the upstairs bedroom.

I know which one is which from the back, but can you tell?