Your step-sister hasn't given blow jobs before, and she's wondering if you'd let her practice her technique on you. Her best friend does them for her boyfriend, and she wants to try some of the things her friend talked about. She puts her mouth over your penis and tries hard not to bite it or let her teeth touch you. Your step-sister has trouble getting your whole penis in her mouth and asks you if your penis is unusually large. She concentrates a lot and manages to take all of you into her throat. She's not very good at blow jobs, but with time she becomes better at pleasuring you.

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