Beth's chest and abdomen were heaving as she gasped for breath. Her orgasm was subsiding even as Tim gave her clit one more light lick. The cunnilingus was not the best she had ever had but it had been the first time for her son and that thought had made her orgasm very intense. He finished kissing her bush and slowly worked his way up until he was nuzzling and kissing her belly button. As he reached her breasts Beth realized that Tim's hard cock was dragging upwards across her thighs getting nearer and nearer to her soaking cunt.
The events of the past few weeks flashed before her eyes. Tim had just graduated from high school and they had celebrated his 18th birthday a few days later. About a week after that she had inadvertently walked into her son's room and saw him lying on the bed and stroking his cock, the largest cock she had ever seen, at least 10 inches long. She had been mesmerized by his moaning as he ran his hand up and down, oblivious to her presence. She remembered the massive ejaculation, shooting sperm all over his stomach and chest and then the ultimate shock of hearing him moan "Oh Mom! Oh Mom!" as he was finishing. She had gasped loudly and that had revealed her to him and she had seen the look of shock, embarrassment and humiliation on her son's face. She remembered staggering from the room barely able to walk and then guiltily rubbing her wet pussy until she exploded in her own orgasm. When she had attempted to reassure and console her son the next morning somehow that had ended with him resting his head on her breast as she reached into his shorts fondling his cock until it was rock hard and stroking it until it erupted, spewing sperm over her hand and dress. And then his attempt at consoling her a few hours later resulted in her giving him a blow job and ended when she attempted to deep throat his cock only to have it explode in her mouth just as it began to slide into her throat.
Then the rules were made. She was in control. There would be no pussy or ass fucking; no sleeping in the same bed; no overt pleasuring of her, other than sucking and massaging tits and nipples, as if him giving her an orgasm was a bridge too far.
After weeks of just hand jobs, blow jobs, tit fucking and resisting intercourse Beth had finally let Tim go down on her and now she was resigned to getting fucked by her son. As Tim began nibbling on her hard nipple Beth realized that "resigned" was not quite the right term. She wanted his huge hard cock to finally slide into and penetrate her deprived pussy. Tim left her nipple and moved his body up so that his cock rested on her stomach and their lips embraced in a passionate kiss. Beth's tongue shot out and suddenly their mouths were open and their tongues were intertwined. She could taste her own cunt juices on his lips and it drove her crazy.
She had expected him to slide into her but suddenly realized he would never consider doing that without her permission. Those were the rules. She suddenly had second thoughts. She knew the first time would certainly not be the last and she had spent weeks trying to avoid this. His tongue darted deep into her mouth again and they groaned in their passion. She knew Tim was expecting a blow job or a tit job. She pulled away slightly, looking at her son.
"I love you Mom." He blurted out.
Beth smiled and pulled her to him hugging him tightly with their heads resting on each other's shoulder. She sighed.
"Please fuck me Tim." She whispered into his ear.
He pulled back in shock looking at her with his mouth open. She smiled slightly. "Fuck me!" She demanded.
Tim was still in disbelief but he raised up and began to move down Beth's body. His cock dragged across her belly and they both looked down at it. She raised and spread her legs presenting her splayed cunt to her son. Beth reached down and grabbed his cock stroking it gently. When it reached her crotch she rubbed the head in the wet slit of her swollen labia and then pushed it down until the head nestled between her cunt lips. His hips moved forward and as his cock pushed against her she directed it to her sex hole. They both moaned as her body split apart to accept his big hard cock. Beth moved her hand to his buttock as he continued to enter her aroused and fully expanded vagina. She had never had a cock that large. She moaned as he continued to fill her and gasped and twitched as his cock bumped her cervix.
That was a shocking first for her. She had always thought there was pain associated with that and although there was discomfort, the thought of being so full easily overrode any pain. Fortunately she could feel his balls resting on her crotch so he was balls deep now. His hips pulled back, pulling several inches of his cock out and then he thrust forward again. Although Beth knew what was going to happen she gasped and twitched again as his cock probed deep into her abdomen. He began thrusting slowly and steadily each time hitting the very end of her vagina. The feeling of his cock sliding in an out of her elastic cunt was wonderful.
Just as pumping a balloon eventually leads to an explosion, each thrust of Tim's cock was pushing Beth closer and closer to an explosive orgasm. She knew it would be way beyond anything she had experienced before and the feeling was absolutely fantastic. They were both groaning and moaning. The rhythmic thrusting and bumping of both her cervix and clitoris was pushing her to the edge. Beth began to tense and arched her back as the explosion approached when suddenly Tim grimaced and thrust deep into her, holding his cock there. He grunted loudly and his body shuddered and Beth knew he was ejaculating.
"No! Oh no!" Beth moaned almost silently as a wave of shock and disappointment swept over her even as she felt Tim's cock pulsating deep in her pussy. He was cumming and she knew it would deprive her of her moment of ecstasy. His head was up and his mouth was open as he grunted several times. As Tim exhaled Beth sighed. She couldn't believe how devastated she felt. His body shuddered several times above her. She attempted to take solace in the knowledge that this had been her son's first fuck and it was with her. That only helped slightly. His body began to relax and he looked down at her with a look of concern on his face as he sensed her disappointment.
"Mom?" He started. She knew he was going to apologize for cumming. Instead he asked "Was it okay for me to cum inside of you?"
She was shocked and a wave of anger swept through her. The little shit was a day late and a cunt full of cum short on that question and there was no thought of her sexual needs. He had some learning to do. She held her anger back though and managed a wan smile.