Step-sister's first sexual experience with her stepbrother

The brunette step-sister of a young man was 18 years old. She had a beautiful body and a nice ass. Her stepbrother was her best friend and she loved spending time with him. One day, they were alone at home and she asked him to help her with math homework. He agreed and they sat down at the table. Soon, the conversation turned into something more intimate and the step-sister started talking about sex. The stepbrother was surprised but he didn't mind. He offered to show her what he was talking about and soon they were both undressed. The step-sister bent over and let her stepbrother eat her pussy. Then, he fucked her hard from behind.