I Shouldn't - Mike and Holly

Trigger warning since this treads into uncomfortable territory for some people. This is a mild, but sexual, encounter between Mike and Holly, set around the end of S1. If this pairing offends you, don't read it.

More than a month had passed since the night El destroyed the demogorgon, and nobody had heard a thing from her since. She was just gone, and nothing in Mike's life made sense any more. He was lost and alone, even among his friends, and most days he simply felt numb.

Here it was, a week before Christmas - what should be the best time of the year - and life had never felt more bleak. To make matter's worse, he was stuck babysitting for the night. Not that he really minded taking care of Holly, it was more the fact that everyone else actually had somewhere to be. Nancy was out with Steve, or maybe Jonathan, Mike wasn't sure anymore, but in any case, she was out. Their parents were off at his dad's office holiday party. That left Mike to keep an eye on Holly.

They had shared a pizza and were now hanging out in the living room, Holly's attention glued firmly to the TV while she watched Rudolph. Bored of the special he had seen countless times already, Mike slipped away for a minute, heading into the kitchen and digging the radio out of his backpack. It was time to make his nightly call out into the darkness, begging El for a sign she was alright. He knew it was a long shot, but the hope of an answer was the only thing keeping him from sinking into despair. As always, nothing came back over the airwaves but crackling static. As always, the silence left him feeling even worse, and wondering if it was worth putting himself through that every night.

Coming back to the living room, he settled on the couch with a huff and Holly snuggled up to his side.

"Why sad, Mike?" Holly asked

He put an arm around her and hugged her close. He was surprised she had even noticed his mood.

"I just miss my friend," he finally answered, deciding there was no harm in talking to her about El.

"Downstairs girl?" she asked.

Mike couldn't help but laugh at the simplistic but accurate nickname she had settled on for El. "Yeah, that's right. Downstairs girl. She's gone, and I miss her, and that makes me sad."

"I'm here," she said, standing next to him on the couch and hugging his neck, planting a peck on his cheek.

"I know," he smiled. "You're here and I won't ever let you go."

To prove his point, Mike wrapped her in his arms and started to tickle her ribs. She let out a squeal of laughter as his fingers worked up and down her sides and she wriggled to get away. When she couldn't break loose, she brought her hands up to Mike's neck, attempting to tickle him back, and soon they collapsed in a fit of laughter on the couch. In spite of himself, Mike couldn't help but feel just a little better; for a moment, anyway.

As the tickling came to an end and they caught their breath, the show returned from its commercial break and they settled down again to watch. Mike was now on his back, stretched out the length of the couch, and Holly was laying on his stomach, her head on his chest. Their attention on the TV, Mike lazily rubbed a hand on Holly's back, those same gentle scratches he would give her when it was his turn to settle her down for a nap. There was something comforting about the physical contact, quiet and safe. Without meaning to, his hand slowly worked its way up the back of her shirt, her skin soft and warm against his fingertips, and he felt her snuggle down deeper against him.

Slowly, imperceptibly, Mike realized he was getting hard, his cock trapped between their bodies. It had been happening for about a year now, always at the most inopportune moments when he couldn't help it. He started to panic, knowing he should be moving Holly, separating on the couch until his issue went again. Instead, he held back, realizing in the calm of the moment he didn't mind it as much as usual. Every now and then she would squirm, readjusting her position on his stomach and a little thrill would run through him. It felt very good. It felt very wrong. The good felt better than the wrong.

Slowly, not wanting to alert her, or scare her off, or worse yet, have her start asking questions, Mike raised his hips an inch or two. His jeans-clad cock slid slowly against his little sister and Mike had to suppress a shudder. Her attention was fully on the movie, but Mike's was only on her. Let his hips slowly drop, and he slid against her again, the feeling even better. Over and over, he lifted his hips, just a little bit, and let them slowly fall again. He brought his hand to rest at the small of her back, lightly pressing down as he raised himself up.

It felt so good, despite knowing how wrong it was. He brought his other arm around her back, hugging her close, holding her firmly against him. Mike moved slow, knowing if Holly caught on, she would have questions he couldn't answer. Sure, he'd had dirty thoughts about some of the girls in his class, and of course he'd thought about El more than a few times. Even now, he would give anything for it to be her curled up in his arms. Still, he couldn't shake the thought that Holly's smooth, little pussy was only separated from his stiff dick by a few layers of clothing.

He knew he shouldn't be doing this. He knew he should stop. He raised his hips again. If he kept going, it was going to be a problem. One last time, then he'd stop, he promised himself. He raised again. And again.

"Shit, I'm really doing this," he swore silently in his head. "Stop. Just stop."

He raised his hips again, hugging Holly down tight against himself. She was small and soft and warm in his arms, and her hair smelled of strawberry shampoo; she was filling his senses. She had no idea what was going on, her attention fully focused on the movie. He tried to reason whether this was hurting her, if she didn't even know it was happening. All the while he held her close, perfectly normal and brotherly were it not for the slow and steady humping of his stiff cock against her.

It was all too much, his thoughts racing between El and Holly, the girl he loved and his little sister who was here, wrapped up in his arms. He was lost in the moment, and suddenly he was cumming. His mind was going wild as he held her there. Rudolph was singing about not fitting in, and she had no clue what was going on, but Mike was on cloud nine. He flexed his hips, his cock pressing in the neighborhood of her little pussy, and he squirted a small glob of cum into his boxers. He flexed again, no longer in control of himself, one hand slipping down to her bottom, holding her down tight against him. One last pump, hugging Holly, depositing another squirt into his shorts, and he was spent, his whole body relaxing.

Through it all, Holly's attention on the movie hadn't wavered, and thankfully, she had no idea what had just happened. Mike lay there for a few minutes, his pounding heart settling down, reveling in the calm afterglow of his actions. Guilt may come later, but for the first time in weeks, he felt a moment of peace. Sitting up carefully, he set Holly back at the other end of the couch and stood up.

"I need to use the bathroom," he lied, as he headed upstairs to clean himself up.

His mind was buzzing about what he had just done. It was terrible, it was unforgivable, it was something he could never let happen again. He also knew he wanted it to happen again.