From a rubics cube challenge to getting my dick sucked, how did that happen?

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I didnt see that coming, but i gotta give it to her. My stepsister totally beat me with rubics cube, so I lost the bet and now I gotta give her what she wants. Which strangely enough is my fucking dick. Im a little hesitant though, seems and feels a bit weird to fuck your stepsister, ya feel me.