Toying with modesty concerning her body

Yesterday, I was folding clothes while Emma and Gavin were taking a bath together. I heard Emma yelling at Gavin- "GAVIN, STOP IT!!!!" So, I walked into the bathroom to see what the problem was. Emma had gotten out of the tub to use the toilet and pulled the shower curtain closed while she was out of the tub. She was yelling at Gavin because he was trying to open the shower curtain, and she didn't want him to see her naked- this occurred after she had already bathed naked with him, and was about to get back in the tub without any clothes on.