Sharing a Chair

We tried to get Catherine and Addison to sit in a chair together so we could get a picture. Of course they did not want to cooperate because of their ages - they had other things they wanted to do! Addison especially had something else on her mind that she wanted to do and kept getting off the chair. Catherine is trying to get Addison to back up in the chair. But, Addison is bigger than Catherine so she wouldn't budge!