Finished playing with my brother until good sex

My brother sat down beside her sister's bed to read her a book. Sister takes and turns off the light. Then he drags his brother to bed. She had long wanted to have sex with her brother. My sister pulled off her brother's pants and pressed her lips to his cock. Then she sat on top of him. They fucked instead of reading a book. Then the girl changed her position and got cancer, then lay on her back. After that, she sucked brother.