"I can't help it," the brother confesses, his voice ragged with lust as he continues to pump his massive, throbbing cock. "I get so hard when I think about you." His sister bites her lip, her eyes locked onto his engorged member, her own body aching with need. "Me too," she admits, her voice barely above a whisper. "I want to see you come, brother. I want to watch you jack off until you can't take it anymore." Their eyes meet, the unspoken agreement hanging heavily between them as they both give in to their forbidden cravings, their bodies writhing with pleasure as they push each other closer to the edge.