Backend compensation.

Jacob's reaction was predictable; shock and confusion flashed across his face. David gave him a moment to process, then said gently, "I don't have much time, son."

Jacob stood there, processing what he just saw as his erection softened but remained notable. He moved to the couch and sat down. "Alot of....what?"

David smiled softly and transformed again. This time, Leah stood before Jacob, her voice and mannerisms mimicking hers perfectly.

"I need your help, Jacob," she said, her tone urgent yet sultry.

Jacob looked at her, bewildered. "Help with what?"

Leah didn't waste any time. She straddled him on the couch, her hands already stroking his growing length. "I need you to fuck me, Jacob. I need your cock in my ass."

Jacob scoffed, shaking his head in disbelief. "You're not serious."

In response, Leah leaned in and kissed him deeply, her tongue exploring his mouth. Jacob's body responded instinctively, his cock hardening and standing at attention. She broke the kiss and stood up, slowly peeling off her purple gym top and gray and purple shorts, revealing her naked body.

She turned around, leaning over the couch and presenting herself to him. "Take me, Jacob," she demanded, her voice a low growl. "It's for science."

Jacob hesitated for a moment, his hands gripping her hips tightly. "You know this will hurt," he warned, producing a bottle of lube. "You're very tight."

Leah looked back at him, her eyes filled with determination and desire. "Please, Jacob. Don't make me wait any longer." She braced herself, arching her back slightly in anticipation of the impact.