After 10 minutes of frustrating penetration denial, Penny finally pushed Tom off of her.
But she was moaning and carrying on so much and so loudly that Tom felt the need to quiet her, so he kept on kissing her in order to cover her mouth. This just got him more and more turned on and he wanted to go back into her and try for release, since he knew this might be his only chance that night.
So he begged her to let him inside her one more time...