Tim walked into the kitchen and saw that Karen was making a protein shake. His eyes went to her ass. She was wearing leggings that hugged her ass and showed every curve of it in striking detail. Tim averted his eyes and turned to walk back to his room.
“Hey, what’s up?” Karen asked him.
Tim turned around and tried to not look Karen in the eye. He had been doing this for the past few days and it had helped him with the large chip of shame that rested on his shoulder.
“Hey, nothing much. I’m just going to play a new video game that I just got.”
“Oh. Why don’t you go for a quick jog with me at the park? It would do you good to get some fresh air,” Karen asked him with a warm smile.
Tim looked at the wall behind her. “No, I’m ok. I’ll just go back to my room.”
“Come on, Tim. Please go for a jog with me. I feel like we haven’t hung out with each other in weeks. It actually seems like you’ve been avoiding me.”
“No, that is not true,” Tim said quickly. “I’ve just been kind of tired and drained recently.”
“You sure?”
“Yes, everything’s good.”
“Ok. Come on, let’s go for a quick jog. I want to hang out with my little brother,” she said.
Tim knew that he couldn’t keep denying her. Plus, he liked how interested she was in hanging out with him. He did miss talking and hanging out with his sister.
“Ok, I’ll get changed.”
“Yay! I’ll meet you outside,” Karen said with a warm smile.
“Ok.” Tim walked back to his room and quickly changed into basketball shorts and a t-shirt. He had to admit that he was feeling happy to hang out with Karen. That feeling of total shame was lifting a little.
They were just going for a fun jog and it would help to put these terrible thoughts about Karen to bed. He wanted to stop thinking about her bare breasts and how much it turned him on. Enough was enough.
He stepped outside and saw Karen was waiting with her phone in her hand. She had her hair tied back into a ponytail and her Airpods were in her ears. The sunlight reflected off of her hair and Tim was amazed at just how beautiful his sister was. He always had heard many comments from his friends about just how hot she was but he always told them to cut it out and that Karen was ugly. He knew now that he had always been lying because it would be weird to say that your sister is hot to your friends.
But, there wasn’t anything truly wrong with thinking that your sister was attractive, right? Tim thought as he looked at her. She was an attractive human being whether she was his sister or not! Was it wrong to think that another human being was attractive?!
“Ready?” Karen asked him as she interrupted his thoughts.
He nodded and they walked over to the park that was two blocks away from their house. It was a bright and sunny day and Tim could see other people jogging and running on the track.
“Let’s stretch before we run,” Karen said. She began to stretch her legs out and Tim followed along. His eyes would look at her ass from time to time but that was normal because he was following her instructions. He had no choice but to look at her stretching techniques which happened to have her ass in view, Tim thought to himself. There was nothing sexual about looking at stretching exercises.
“Ok, let’s go,” Karen said. She walked to the track with Tim beside her.
“Ready?” she asked him with a smile.
“Yup,” he said.
Karen began to jog and Tim jogged beside her for a few laps. It had definitely been some time since he last went for a run and he could feel it. His heart was pounding in his chest and he felt like he was going to collapse. He started to slow down.
“Are you ok?” Karen asked him. She hadn’t broken a sweat yet while his shirt and forehead were drenched in sweat.
“Yes, I’ll catch up,” he said through his heavy breathing.
“Ok,” she said.
He started to jog really slow as Karen moved ahead of him. His eyes harmlessly went to her ass and he watched how it swayed from side to side as she ran. He started to feel his cock stiffen in his shorts.
This is normal because it’s the blood pumping from my jogging, Tim thought to himself. He even nodded in agreement with himself. He wasn’t getting hard from looking at his sister it was the high blood flow from his running.
He jogged for a couple more laps with his sister outrunning him on the track. They stopped after some time and got some water bottles from the nearby vendor.
“How do you feel?” Karen asked him. Her face was covered in sweat but she still looked beautiful.
“I feel great. I definitely needed that. Thank you for getting me to do it with you,” Tim said with a smile.
“I’m glad. We should try to hang out more. I feel like there was a distance between us and I don’t like that. We’ve always been close,” Karen said.
“I agree. I’ll make more of an effort to spend time with you,” Tim said as he looked at her. He no longer felt the need to not look her in the eye. The shame had completely lifted from him.
“Ok, I’d like that,” Karen said with a smile. They walked back to their house while talking about the next year of school. Karen was going to be starting her sophomore year at college while Tim would be entering his first year at the local community college. Tim had no idea what he wanted to major in and figured that he would see what he likes while in college. Karen told him to not worry and to just focus on taking general ed classes and his major would come in time.
They arrived back at their house and went inside. Karen went to the kitchen to grab her protein shake from the refrigerator. She was bending over when Tim looked over at her ass. It was so nice and tight that Tim’s cock twitched.
“I’ll see you later,” Tim said as he walked back to his room. He didn’t want Karen to see what was going on in his nether regions. His cock was now bulging in his pants. He entered his room and closed the door.
He took off his sweaty clothes and saw that his cock was now fully erect. He tried to think of other things to lose his erection but his mind kept going back to Karen’s ass. He climbed into bed and began to play with himself.
His eyes were closed and he thought about Karen’s ass. There is nothing wrong with what I’m doing, Tim thought to himself. She’s a beautiful and sexy girl and it does not matter if she is my sister. Didn’t Jamie have sex with Cersi on Game of Thrones and she was his sister?! Tim thought to himself. This was not wrong.
He began to stroke his cock faster as he thought about Karen. What would her mouth feel like on his cock? He thought. Were her lips soft and her mouth wet and warm? He began to softly moan as he jerked himself. He was close to cumming so he jerked his cock faster.
His cum burst out of his cock and onto his hand. Cum oozed out for a few seconds as he still stroked himself. Images of Karen flickered in his mind.
He laid in bed for a while with a large smile on his face as he thought about Karen. This was right and I have nothing to be ashamed about, Tim thought with a smile on his face. I want my sister.
Source: reddit.com/r/eroticliterature/comments/qalhoq/mf_tims_lust_for_his_sister_part_2