I was 16 and my little sister was 13, she used to always wear boots shorts around the house and she had small tits so she never had a bra on. She would drive me crazy how she would bend over and her shorts would ride up her ass. She had to know I would stare at her. My parents went out for their anniversary one night and we stayed home. I was high watching a adult comedy that showed tits so I was already horny. My sister came in the room with her boots shorts on being a tease. She knew i was high and kept asking and begging me to get her high. I finally gave in and got her high, she started acting goofy and starting playing around so I held her down and poked her sides because she's ticklish. She was squirming around and my had slid across her nipple. She looked up at me and we made eye contact for a few seconds and I couldnt help myself I grab on her tits as I slid my other hand down her shorts and started playing with her before I made her suck my dick until I came in her mouth