My sister has a narrow entrance. I'm a perverted dad... She was a pointy girl with short hair. She acts like my sister, so I pretended to be her brother and acted spoiled. She says she doesn't want to kiss her brother. She was really reluctant, so I rubbed her body... She started to smell like milk. I couldn't help but insert my erect penis, but she said it hurt because the entrance was narrow. I used my dad's technique to loosen it up and insert it all the way. When I thrusted my penis into her, she repeatedly said "It hurts!"! Of course I ejaculated inside her. I wonder if my child with my sister will grow up healthy?