My Step-Sister Finds My Porn and Wants Me To Show Her My Favorite Position. My sister stole my phone and went through it looking for my porn, I can not believe she is even considering telling out parents... I bet her not to. Serena tells me the only way to keep her mouth shut is to fuck her just like in the movies I like, I fuck my sister like a pornstar then cum in her mouth.... and she swallows it......