"You're not my real brother," she whispers, her breath ragged as she tries to suppress her lust. "I know," he replies, his voice hoarse with need. "But right now, you're all I have." Their hands roam, exploring unfamiliar territories, their bodies arching into each other. She gasps as his fingers find her clit, rubbing it in slow, maddening circles. He groans when she wraps her hand around his cock, her touch tentative yet eager. Their clothes become barriers they desperately want to remove, their bodies craving the forbidden friction they've been taught to deny. As their passion builds, so does their shame, but they can't stop, lost in a web of taboo desire they never asked for.