Marion felt odd when she got home. Her grown children Ryan and Susan and Rachel greeted her. None of them seemed aware that she had an alien creature, pulsating on her back, under her blouse. She felt like her rider's presence should be obvious to them all, but Ryan simply shrugged, Susan smiled, and Rachel never gave her a second glance. When she saw Paul and he gave her a kiss, he asked her casually, "Where have you been, dear?"
"Chloe's," Marion managed to say. Paul didn't seem to realize she had a rider either. She blinked rapidly, and suddenly realized the deadline her sister Chloe had given her.
She only had five days to help her rider take control of her mind. Or else. Marion wasn't sure what the consuqences of failure would be, but from Chloe's tone she was sure it would be worse.
Marion never had sex with Paul on a daily basis. Usually, he wanted it more than she did, and they only did it once or twice a week. Would Paul be willing to do it every day?
Marion also was worried about her bodily alterations. Marion now had a rider on her back. What if Paul saw it?
"Make sure he doesn't, sweetie," Chloe had told her. "Or we'll have to come for him sooner than we planned."
That sent a chill down her spine.
She had one thought in her mind: to have sex with Paul. Chloe had told her the rider was immature, but Marion already felt it trying to influence her. Already it was filling her mind with the urge for sex. Marion had always been attracted to Paul but never had the sex drive she did right now. She felt she desperately needed to have sex with Paul to help strengthen her rider. Marion tried to resist, but she knew the consequences for failing to comply. If she disobeyed, they would take her family.
And so after dinner that night, Marion was all over Paul, hugging and kissing and touching him. Paul got the hint, but chuckled, "Little girl needs some loving, doesn't she?" Marion had nodded, smiling eagerly. She knew Paul would find her behavior out of character, since he was usually the initiator and she the reluctant one. But she had no choice.
Paul smiled and took her by the hand to the bedroom, as he always did. But this time Marion wasn't the sheep going to the slaughter, giving her body to satisfy him. She needed it now more than he did.
They made love with the lights off. Marion made sure that Paul didn't see or touch her upper back. One time he tried to wrap his arms around her, and she caught them just in time, and moved them down to her waist. She also made sure to ride on top of Paul, remembering Chloe telling her that her rider would grow more quickly if she made the most exertions.
As Marion rode up and down on Paul's shaft, she felt tremendous angst mixed in with her sexual arousal. Her ass and thigh muscles strained as she worked herself up and down furiously. Her arm muscles throbbed as she held herself steady as she bounced up and down on his shaft. She was actively cooperating in her own enslavement. She was working as hard as she could to help an alien creature take over greater and greater control of her mind. And there was nothing she could do about it.
She could feel her rider draining energy from her on her back, sucking the vitality out of her to make itself stronger. Marion felt especially drained after they had sex, and it wasn't just because of the exertion. It was because of the rider on her back, the parasite, using her energy to make itself bigger, larger. And more in control of her. As she lay in bed in the dark with Paul after their intercourse, she wondered how much more powerful she had just made her rider. She felt it throbbing on her back and in her mind.
********
The following morning after Paul went to work she disrobed and anxiously looked at her rider in the mirror. It didn't look much larger. But it was still an alien creature, pulsating on her back. It had fed her dreams of contentment and joy as she slept; she had vague memories of being a willing part of the Hive, and loving every moment of it.
Why didn't she just remove it?
Marion was surprised that the thought hadn't occurred to her. The worm had caused her pain when she touched it, but the worm, which was now gone, had been lodged in her very sensitive clit.
She moved her hand behind her back, using two mirrors to guide it. But when she moved to touch her rider, she felt a sharp stabbing pain.
"Ow!" She cried.
Marion cried to grab onto her rider, but felt the pain increase tenfold.
She dropped to the floor of the bathroom, sobbing rapidly.
"All right, all right!" She cried. "I'm sorry!" The pain continued. "I won't do it again! I promise! I really do!"
The pain slowly started to fade. In a moment, it was just a memory.
Marion slowly got up and looked at her rider in the mirror. A wave of panic went through her.
There was no way to remove it.
***************
Chloe called her on the holocomm shortly before lunch.
"Hello, dear," said Chloe. "Did you have sex with Paul last night?"
Marion looked around the room and thought rapidly; Paul was at work and the kids were at school; they could converse privately. "Yes," she said, licking her lips nervously.
"And how did it make you feel? Wasn't it the best sex ever?"
"I..... Yes." Marion had to admit it. Her rider had amplified her sex drive. Every nerve ending seemed supremely stimulated, all in an effort to get herself to exert herself to the maximum to give her new master the strength it needed to grow and take control of her mind.
"Are you pleased with your rider?" Chloe asked.
"No, I'm not," said Marion. "Please, Chloe. Can't you take this thing off me?"
Chloe's holoimage frowned. "No. It will never come off you. Once you join the Hive, you can never leave."
"But you said my rider isn't even ma... mature. Can't you remove it?" Marion asked.
"I wouldn't want to. And in a few days, neither will you," said Chloe. "Remember our deal. You WILL have sex with Paul every night until your rider matures."
"Do I have to?" Marion asked.
"No," said Chloe. "If you prefer, you can come here every evening. I'm sure Stephan and Christopher would be eager and willing to help your rider reach maturity instead."
"No!" said Marion, her eyes wide.
"Then you will continue to have sex with Paul, every night. Say it!"
"Yes," said Marion. "I will have sex with Paul, every night."
"And you will always be on top, to make the maximum effort for your rider."
"Yes," Marion sighed. "I will be on top."
"Because you want your rider to mature." Chloe looked intently at her sister.
Marion gulped. "Because... I want my rider to mature."
"Good," said Chloe. "Don't look so glum, dear. In a day or two you're going to be very pleased with yourself."
*********
Paul was surprised when Marion cuddled up against him the following evening after dinner, sitting in his lap and kissing him. "Again?" he asked.
"Um hm," said Marion. Her mind was full of ambivalence, but her body wasn't; her immature rider had flooded her with sexual need. It was all she could do to prevent herself from raping Paul in the kitchen. They walked hand in hand to the bedroom and passed by Rachel and Susan. Normally Marion would have blushed, but her mind was too preoccupied for that.
Once again Marion was riding up and down on Paul's penis in the dark. He had also expressed surprise that she wanted to be on top, again, as Marion usually preferred to let Paul "do the work". But her rider demanded she be on top and she found she couldn't resist. As she bounced up and down on Paul's shaft, she could feel the heat of the rider on her back and the tendrils slowly growing, expanding into her nervous system, getting a firmer hold on her brain and her breasts and her cunt.
When it was finished and she lay in bed with Paul, totally exhausted, she wondered,
What am I becoming?
*********
The following morning she looked at her rider in the bathroom mirror again. It seemed to be a little thicker and a little wider than before. She didn't know which would make her more anxious; if it grew slowly or quickly. Too quickly, and it would gain control of her mind; too slowly, and Chloe might take her entire family.
At that moment Paul entered the bathroom. Marion, startled, moved backwards so her back was against the wall. It was imperative that Paul not see her rider.
"Hey beautiful," he said, giving her a quick kiss.
"Hey you," said Marion, trying to sound normal.
But then Paul took a step back and studied her.
"What's... what's wrong, Paul?"
Paul was silent for a long moment. Then he said, "It's just... you're so beautiful. Something about you... you're just so sexy."
"Oh Paul!" Marion cried. She hugged him tightly. He laughed as he hugged her back, though she was careful to make sure that his arms hugged her lower down.
"Do you find me appealing, Paul?" she asked, after they kissed again.
"More than ever," said Paul.
As he turned to go, Marion felt a tingling on her back and in her vagina.
*********
Chloe called her on the holocomm later that afternoon, before Paul got home, but after the kids had returned from school.
"Did you have sex with him again?" was her first question.
"Yes," said Marion.
"Is your rider growing?"
Marion paused. "Yes," she said, in a small voice.
"Show me."
Marion looked down the hallway. "Chloe, the kids are home from school."
"Are they in the living room right now?"
"No," said Marion. "But-"
"Show me," Chloe demanded.
Marion felt the incredible urge to take off her blouse. She nodded and slowly unbuttoned it, one by one. She heard Rachel talking to someone in her bedroom. If Rachel or Susan or Ryan came out and saw her rider, she would have a lot of explaining to do.
Nevertheless she took off her shirt and slowly turned around. The rider hung between her shoulder blades, just above her horizontal bra strap.
"Yes... it's definitely bigger from the day you first got your rider," said Chloe. "Do you remember how good that felt, how you begged and pleaded to have your rider implanted?"