Step-brother instructs step-sister in oral sex and proper behavior with boyfriend

In this steamy video, the step-brother takes it upon himself to teach his step-sister a thing or two about pleasing her boyfriend. He starts off by instructing her on the basics of giving a good blowjob, showing her how to use her tongue and hands to drive her boyfriend wild. The step-sister eagerly follows his instructions, taking his cock in her mouth and sucking it with enthusiasm. As she continues to pleasure him, the step-brother can't help but comment on her progress, praising her for her efforts and encouraging her to be more assertive. He tells her to be a good girl and do what she's told, to make her boyfriend happy and satisfy his every desire. The step-sister listens to her step-brother's instructions, doing her best to please both him and her boyfriend. The scene ends with her receiving a hot load of cum as a reward for her obedience.