The brother suggested that his sister play his flute.

The brother peeked into his sister's room and saw her trying to play the flute. He took out his cock and told her to practice on it first. The obedient sister took her brother's cock in her mouth and began to work hard. Then the brother grabbed her by the hair and fucked her throat thoroughly. Next, he worked his tongue between her legs and then wanted to stretch her tight pussy over his cock. But suddenly their mother walked into the room. And now the couple will have to fuck behind their mother's back.