As they kissed, Fred could feel John's erection pressing against her thigh. When they broke apart, she looked down and licked her lips. He was so beautiful when he was naked and aroused. And, without questioning what he was doing, Fred rolled over to her side and moaned when she felt him move behind her.
Fred shuddered a little as he ran his hand down her body and pulled her leg back to rest on his. She loved this position because they became almost like one person and he went in so deep. Closing her eyes, she shuddered even more as he ran the tip of his cock through her wetness. "Please, I need to feel you," she pleaded while pushing back.
Soon he was pressing himself inside of her tightness and Fred moaned. She was still sensitive from her recently orgasm and she felt herself start to tighten up again. Squeezing her eyes shut, she forced herself to calm down by thinking about mathematical theories. That seemed to do the trick and she relaxed in John's arms.
"I love doing everything with you, John," she whispered. She reached behind her and tangled her fingers in his hair. And when he started to thrust inside of her, Fred pushed back against him.
It didn't take long for Fred to start losing control again. A sheen of sweat formed over her body and she felt herself start to tighten around her husband. "John..." she choked out just as everything inside of her exploded and she came hard around his cock.