I've been thinking about it lately. I have said this to both of my kids, both have different dad's.
YDD picked up a pen and wrote on the wall, she wrote her name of all things. I asked her if she did that at her dad's and she said "no". But when she was on skype with him, i said "oh kennedy likes to color on walls" he said "kennedy has always liked to write on walls". One time she cut her hair, nothing noticeable, exh just found the hair on the ground in the bathroom. I have never had a problem with DD writing on the walls or cutting anything, till this week. She wrote on the wall and "accidently" cut my bed sheet. Now she doesnt get those things.
Have you asked your kids or SK this question??