Your boy had popped to the shops for some snacks for him and his girlfriend to enjoy together and you take full advantage of the situation. You enter his room where you know she's alone and start questioning her inappropriately. She loosens up a little and answers your questions. You tell her she needs to know what she's doing with a cock or your boy won't stick around. She allows you to get your cock out and show her but remains apprehensive. You then tell her she needs to know what to do during a blowjob and there's only one way to teach her. She eventually accepts as she wants to be confident when it comes to it. Except, you don't do much teaching and just wanted your cock sucked by her. She gags and you cum in her mouth.. all before he comes home! .