I went into my sister's room and saw that she was wearing only glasses and fingering her nipples with a worried look. Then she showed me how to put clothespins on her nipples, I started to get really excited because she was drooling on her chest and rubbing her boobs with oil, sticking out her tongue and rolling her eyes. I wanted to cum on her face, so I took out my dick, and my sister started jerking it off with her small tits. My cock rubbed against her tits so pleasantly, and I looked at her face that I couldn't hold back for a long time and finished on her pretty face. Cum was running down her lips as she looked at me and took a deep breath