Step daughters/Asexual/1st Wednesday/Masha Watches Sex/Calm/persuade
"Really, it's fine." You tell her. "See? The mommy on the show is teaching her kids about it. Kids play games like this all the time too, they just have to keep it secret from adults. The mommy there is just really cool, but most of the time they at least let you touch yourself as long as it's kept secret and not where other people can see it."
She still doesn't seem to trust you, and keeps looking up to the TV screen and then casting suspicious glances at you. You catch her fidgeting her legs a little as though she's considering something, but ultimately she just doesn't do anything and just watches in silence as the boy on screen fucks his sister.