Sister is bored and wants to play a game. She will be blindfolded, and he will put items in her hand to see if she can guess the object. Let's play that same game but with her mouth... then sister hot/wet pussy! She will never think that the warm dildo is her brother's cock!! But we have to keep the volume down, or mom and dad will hear us! Wait, did brother just cum inside sister's pussy?! She is going to be so upset! Or will she? ;)