This happens when bored step-siblings spend some time together
Once you take care of your house & yard, then trade places. So, eventually, I got her to let me take off her pants and later on her shirt. Actually, I just spent the better part of an hour helping him build his LEGO. And reading together — separately — is a wonderful way to take her somewhere so that you love and respect her. Take a seat beneath the glass-and-iron roof and watch the traders pack up after another day.