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

Description: 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.