Boredom turns into temptation for this brother and sister. She offers him a sneaky handjob, her small hand barely wrapping around his thick, veiny cock. He groans softly, trying to be quiet, as she strokes him expertly, her palm rubbing against his sensitive head. Her eyes widen as she feels him throb and pulse, ready to explode. She quickly moves her hand, letting him finish onto her waiting, eager mouth.