Includes: Bisexual Dirty Talk, Cum Encouragement, JOI, Challenge, Masturbation Game, Dildo Blowjob Encouragement, Masturbation Encouragement, Masturbation, Dildo Fucking, CEI. Sis finds out that bro is bi when she walks in on him giving a dildo blowjob to practice for real cock. Sis thinks up a game to help him, like a good sister does. She will masturbate, and while she does bro will give a dildo blowjob and watch. When she stops, bro will masturbate and sis will watch. Ends with cum encouragement and CEI.