Becoming my Step-brother's Mistress

Chapter 9

Autumn spooned her sister for warmth. Jocelyn's shivering stopped soon afterwards. Their bodies had both changed a lot since they had laid in the same bed, so it felt a bit strange to Autumn, but she just wanted to get warm.

As she heard the rain diminishing, Jocelyn began to snore. Autumn finally felt more relaxed. But as she rolled onto her back, away from Jocelyn, her back pressed firmly against Merlin's rock hard erection. She couldn't believe he wanted to have s*x now. She immediately became angry. "What the f**k," she whispered to him, trying not to wake her sister. He was on his side facing her, but his eyes were closed and he said nothing. When she listened to his breathing, it sounded like he was still sleeping. She smirked and flicked his p***s with her middle finger. He didn't react. She pulled up the sheet a little and while looking at his eyes, flicked it again, but as hard as she could. He grunted, but didn't move or even open his eyes.

She laughed a little at the sound of his grunt. He must be having 'morning wood' or whatever her boyfriend called it. Still, she was surprised that anyone could be such deep a sleeper. She grabbed his d**k firmly around the shaft, her fingers not even touching because of the girth, and looked up at his face. As she tugged on it he didn't give any indication that he was awake. Then she pushed hard against his shoulder until he rolled onto his back.

She lay against the hard mattress and yawned. It was nice and warm between her sister and her stepbrother. She tried to sleep, but she kept looking at the tent of fabric her stepbrother's p***s was making in the sheets. Trying to fall asleep was quite difficult because she began to feel very hot and wet between her legs. It couldn't have been from just holding his d**k right? She tried in vain to sleep. Maybe I can just masturbate quickly, she thought, because the horny feeling wouldn't go away. She always slept great after an orgasm.

It was a bit awkward, but she closed her eyes and pushed her hand into her panties. They were already soaked from thinking about her step-brother's d**k. As she rubbed against her clit, she remembered the morning, right after Thanksgiving only a month ago. Merlin had pushed her against his car and said he needed to f**k her. She went over the scenario several times as she m*********d, but she only approached the orgasm, never able to complete it. Damnit, she thought. It was just like before. She had tried to masturbate almost weekly since the event, going through the scene in her mind, but was never able to reach release. And unfortunately she wasn't able to have an orgasm with her boyfriend either. She had come to the conclusion that she needed her step-brother's big c**k inside of her.

Her eyes shot open and she looked to her step-brother's crotch. Every orgasm with him had been amazing. She pulled back the sheet on his side to have a better look at his d**k. The big head looked dark purplish in the dim light. His c**k curved over its impressive length towards his torso as if pointing to his well-defined abs. It was difficult for her to determine its exact dimensions as she had never been good at that sort of thing, but it was over twice her boyfriend's size, of that much she was certain.

When she thought more about the first time she had experienced him inside of her, she reasoned that he had taken advantage of her. So maybe it was time she did the same to him. He was a very deep sleeper, maybe she could just touch her clit with him inside of her.

I must be crazy, she thought. She put her hand to the shaft of his c**k, and began pulling up and down while rubbing her clit with her other hand. She looked to his eyes, but they remained closed. If she was going to do it she had to do it quickly.

She felt a bit of precum from his d**k ooze out onto her hand as she felt herself get close to an orgasm, so she drew up all her courage to sit up and straddle his legs. She pulled the sheets up around her hips to stay warm. Her eyes quickly went to his to make sure they were still closed, before she looked back to her underwear. She pulled the crotch of her panties to the side and grabbed the base of his c**k, angling the tip against the entrance to her p***y as she stood above him. She looked to her younger sister asleep on the same bed. As she held his d**k there, she had second thoughts about going through with it, but Autumn wanted to come so bad it was almost painful. She needed her Stepbrother's d**k inside her, so she would have to be extra quiet.

As she lowered her eager p***y onto his big d**k, there was only a momentary pause as the big head struggled at her juicy entrance. When it slipped slowly in she immediately began to moan. She closed her mouth, careful to be quiet. She pressed both of her hands to either side of his waist, looking at the two silver crucifixes on his chest, and slowly lowered herself on top of him. Her neck and chest immediately became flush. She had to bite her lower lip, so she wouldn't cry out in pleasure as his girth penetrated into her slippery tightness. Because her m**********n had brought herself so close, she was already having a full orgasm. She tried to keep herself held up, but it was no use. As the pleasure filled her body, she collapsed in a heap on top of him. His length was inserted nearly to the base as her p***y squeezed his thick manhood tightly. She cried in pleasure into his muscular chest.

"Huh?" she heard Merlin say.

Fuck, she thought. She had woken him up. But she wasn't surprised with how strongly her p***y was pulsing on him

"You're fuckin' tight," he said.

"Shh," she replied with labored breathing as she tried to recover. She felt his hips begin thrusting as he started moving his d**k back and forth and the bed began to shake. "Not so rough, Jocelyn's in the bed too," she said.

"Huh? What is she doing here?" he asked as his pelvis stopped moving.

"The ceiling was leaking over our bed," she said. "We needed a place to sleep and you wouldn't move."

"Leaking? And you had to help yourself to some d**k?" he chuckled.

"You owe me," she said.

"Really, How so?"

"You... you..," she stumbled over her words as she felt him grab her hips. She was blanking on a comeback, so she told a bit of truth. "Your big d**k woke me up. I figured you wanted to have s*x too," she whispered. His began to move his p***s forcefully.

"Careful what you wish for," he said. The bed shook as Merlin thrust up, deep inside of her and Autumn cried out.

"Wha- what?" Her sister said. Autumn immediately dropped on top of Merlin and rolled over to face Jocelyn as the sheet was pulled up to cover them.

"What was that? I felt shaking. An earthquake?" Jocelyn said as her eyes opened.

"Uh- y-yeah, an earthquake. It's ok, just go back to sleep it's fine," Autumn said.

"Oh-ok," she replied sleepily. She closed her eyes.

As Jocelyn began to fall back to sleep Autumn felt Merlin's c**k from behind. He began to slip his c**k back into her hot p***y.

"We should stop," she said after moaning softly.

"Got to finish what you started now that you woke me..." She felt his big hands on her ass and against her p***y as he turned her onto her knees and spread her p***y lips. The tip of his big d**k pressed into her hot interior as his hands pushed her upper back down.

She was on all fours and so her beautiful round ass was angled for doggie style. Her head was now buried into the pillow as his big c**k began burrowing into her p***y. She put her hands back against his hips, trying to prevent him from going so deep as she looked at Jocelyn, making sure her sister's eyes remained closed. Merlin pushed her hands away.

She was afraid that he was going to be too rough, so she pushed back against his loins again.

"b***h, get those hands away."

She did as she was told, but his d**k felt rock hard when it went against her back wall. She could feel it almost throbbing as it f****d her. It was too much. She put her hands back again, but he held onto her wrists as he pushed slow and deep. In a way, it was a good thing her sister was in the same bed. Last time he had f****d her, she was walking funny the next day, but at the time it had felt amazing. He was forced to go slower with her sister Jocelyn on the same bed. Unless he wanted to get caught?

She moaned when his d**k went to the back wall of her p***y again, but the pillow muffled her cries. When Merlin let go of her hands she put her hands to the sides of the pillow, gripping firmly on the mattress. She felt him lean forward, his head down next to hers as he wrapped his hand around her hair and raised her head slightly.

"You missed this d**k huh?"

"Y-yes," she panted. She truly enjoyed how he f****d her.

"You got a tight p***y," he said. "I could f**k it all night long. Get you loosened up."

His language was crude, but at that moment she didn't care.

His d**k moved quicker as it plunged into her wet depths. She struggled to keep quiet. Her lower lip felt sore with the amount of biting she was doing to prevent crying out in pleasure.

Merlin reached his hand around and cupped one of her large breasts over her bra. Then he squeezed her n****e. She let a small cry free of her lips. Merlin sighed and covered her mouth as a warm feeling starting at her core reverberated over her body like an earthquake releasing tension. She had come again on his thick c**k. He released her mouth when she had stopped shaking as he rolled onto his side with her. Autumn gasped loudly as the bed shook a bit when they changed positions.

"Huh?" Jocelyn said. The pair were both silent until a few minute later when Autumn's sister fell back to sleep.

"This is bullshit, come here," Merlin said, pulling Autumn onto the cold carpet, his d**k bobbing up and down as it came free. He turned her flat on her back and started long slow strokes into her slippery crevasse. Although most of her body felt cold, because they had moved out from the bed covers, her nether regions felt very warm.

Autumn rubbed her hands over the muscles of Merlin's torso, her fingers delighting in his well shaped abdominals and wide chest. The silver crucifixes on his neck clinked a bit as he ramped up the speed of his thrusts. Autumn couldn't stop herself from crying out again. Merlin grabbed the pillow from the bed and placed it over her face. In this position, his c**k was curved and pressing firmly against her g-spot. The pressure and pleasure was very intense. She squeezed the pillow, crying into it with absolute ecstasy as another orgasm overwhelmed her ability to function. When she finally recovered she had just one thought. It wasn't fair. How could her stepbrother be so much better in bed than her boyfriend? She wondered if addicts had this same feeling, a moment of lucidity when they realized something was wrong, but knowing they were hopelessly addicted.