Elliot stared down at his cock as she lowered herself down onto more and more of it. He stared through half lidded eyes, his breathing shallow and mixed in with moans as he felt his cock throb against the moist walls of her sex. When he felt his tip his her cervix, he moaned in pain, not expecting it when she then lifted herself up and rammed herself down onto his cock. His body tensed up in a mixture of overwhelming pain and pleasure as he felt her cervix tightly squeeze around his cock. He couldn't prop himself up on his elbows any longer, he flopped down to laying flat, loving the way the tip of his cock felt in her womb. "I-It's so tight...big sister." He moaned the words out rather helplessly, staring up at the ceiling, his gaze clouded by lust.