義理の妹は家に一人でいるわけにはいかないので、リビングルームで何かをすれば静かに過ごせるように言ってくれます

My stepsister can't be alone at home, and she tells me that if we do something in the living room so she can be calm, I tell her to lie on my lap while she calms down, and she ends up taking out my cock