You meet your new girlfriend's little sister. She seems cute, bubbly, and maybe a little shy? She blushes when you ask about relationships and prefers staying home to dancing in the clubs. But when she walks away, she leaves her phone lying on the couch. It looks like there's a video pulled up...what could it be? The scene changes to a recording of your girlfriend's sister in lingerie! She talks dirty and starts masturbating. You watch the whole thing but hear your gf's sister in the background. She comes back looking for her phone, but doesn't seem to notice the difference in you until later when her sister has left the house. When she realizes you've seen her naked, she looks surprised, but instantly changes into a flirty slut. She seduces you and fucks your cock (POV) and begs you to cum inside her tight wet pussy. You cum in her and she stands up and shows the creampie gushing out of her slutty pussy. Not a word of this to my sister!