My sister is a very jealous woman, and doing anything to her is almost like it’s against the law. That’s why having sex with her guy has been my biggest sexual fantasy. Not just because of the thrill of messing with her life without her knowing. It’s also because my sister’s boyfriend is a really nice guy and he’s showed me on many occasions that I can trust him for anything. That’s why on a regular day, I decided to open my sister’s room door to pretend that I needed something from her room and I saw the perfect opportunity to have sex with her boyfriend. He looked at me, and he came close and touched my body with his hands. We kissed and ended up in bed, me greedily sucking his dick. Then I lay down on the bed and he kissed my whole body until he reached my vagina.