Her sister is fighting back already

The other night N and I were snuggled on the sofa. She started out just sitting beside me but gradually she ended up using my belly as her own personal pillow. That is until her little sister decided to give a 'little' kick right where N's head was. She sat up super fast, looked at me and said "Mommy! What you do!". LOL I explained it was her little sister kicking but she just seemed annoyed that her 'pillow' kicked her.