Impregnating Bully Step-Sister

your big step-sister is a bully. she has her way with you and always has. you try to sneak your secret girlfriend over but your big step-sister catches you with her! big step-sister is so mad at you! she yells and insults you for cheating !! your girlfriend is shocked by what's going on and is frozen in fear! your big step-sister commands you to fuck her doggystyle right in front of your girlfriend, you have no choice. you do as big step-sister says! you start fucking your mean bully of a step-sister all while your girlfriend is made to watch! your mean step-sister mocks and insults your girlfriend while you fuck her pussy, bragging about how she's not on birth control and you're going to knock her up again!!!