You're laying in bed but you're not tired, so you go into your Sisters room. She is always such a brat. She tries to ignore you, but eventually asks what you want. You tell her you’re lonely and scared of the dark. She knows you are not afraid of the dark, you’re just being annoying. She lets you stay in room, then offers a spot in her bed. You see her tiny pajamas and decide not to sit next to her, its too revealing. She thinks thats weird and realizes you must be getting turned on. She spots your boner and embarrasses you about it. You tell her that you’ve never seen boobs before. She knows you’re lying, you’ve definitely seen boobs on the internet before. Being a good Sister and all, she shows you her titties. You get really excited and she takes the rest of her pjs off. Now she asks if you’ve ever seen a pussy, in real life. She shows you hers, and tells you to jerk yourself off. You both masturbate together, she rubs and spreads her pussy for you. Finally she watches all your cum shoot out of your cock.