When I was 16 and my sister was 13, she got sunburnt bad. She asked me to put aloe on her, something I've done hundreds of times. She got undressed and laid on her stomach. However, this time, when I rubbed her ass and thighs, I made sure to rub her pussy too. I could tell she was loving it as she even arched her back some for better access. I spread her legs and get between them pulling my cock out. I rubbed it up and down her slit asking if she wanted it. She whimper a soft "mmhmm" for me and let me slide all 5 inches deep inside her. We fucked until we both came. She came twice before I ever did. I pulled out and she let me cum on her B cups.