Supervillain Idol System: My Sidekick Is A Yandere

With his senses, he could hear her breathing increase and her heart rate rise again.

'She must either be really anxious or just very sensitive,' Don thought, keeping his hands around her tummy area and gently moving them around.

Her skin was incredibly soft and her sweet rosy scent was very apparent at that distance.

Summer looked down briefly at Don as he was busy running his hands along her abdomen and couldn't but bite on her lip ever so slightly.

'That feels nice…' she thought, though unable to say it out loud.

Don didn't need to keep this up for long before Summer relaxed under his touch, her heart rate and breathing becoming more controlled and stable.

He paused his rubbing for a moment before slowly moving his hands higher up her body. Immediately he began to do this, Summer tensed up again.

But this time, Don didn't stop. He continued to move his hands while gently caressing and massaging her along the way before stopping just under her breasts.

He could feel their ample softness just as he made contact.

Don was about to go higher but then he got an idea. He looked up at Summer, who was trying her best to look calm and said to her, "it'll be hard for me to reach properly with you standing so sit on my lap."

'!!' Don's words caused an already tense Summer to become even more tense as her eyes widened in surprise.

She couldn't even hide this expression but quickly tried to compose herself, looking away from Don and muttering, "s-sure…"

Her usual cool demeanor was nowhere to be seen and she now seemed more like a shy and obedient child.

With Dons hands still resting just under her breasts, Summer extended her own hands and placed them on Dons shoulders before slowly straddling herself onto his lap.

The shorts she wore were very tight and made of a very thin material so he could feel the softness of her thighs against him as she settled on his lap.

Their faces were mere inches apart now so Summer couldn't avoid his gaze so easily but this didn't stop her from turning her head away to the side while blushing profusely.

Don couldn't help but smile at how cute she looked right now and he decided to tease her a bit by lowering his hands back down to her waist area. He then suddenly held her tightly and made her move even closer to him, his crotch pressed practically pressed against hers.

*Mm!* Summer couldn't help but let out a cute muffled moan in surprise, her eyes first widening before she frowned and turned to look at Don with a narrowed gaze, "h-hey!"

"Sorry," Don quickly apologized while moving his hands back up her body, "just trying to make sure you're in the best position. Are you uncomfortable?"

"No… but," Summer hesitated, but chose not to complain. "Just give a warning next time alright?" Discover tales on -mp _y,r.

"Sure, my bad." Don accepted being at fault with a gentle tone. This kinder, gentler side of him was very strange for Summer and she found it hard to argue with. Don mostly did it to make Summer more comfortable but he didn't expect for her to be so agreeable when he talked like this.

But since it was working, he continued on this path. "I'll be starting now, tell me if you want me to stop alright?" he said softly while smiling at her.

His words made Summer's heart skip a beat, but she just nodded slightly and muttered, "sure…"

Without further ado, Don made his move.

He started by first gliding his hands over her breasts at the same time. As he did this, he could feel her nipples, which had become hard and perky. Given that it wasn't that cold, it was clear that they were this way because she was aroused.

But Don chose not to comment on this yet and just focused on making her more relaxed and aroused first.

After gliding his hands over them once, he gently held them both simultaneously and gave them a firm but gentle squeeze.

*Mmpf~* Summer let out a muffled moan in response to this and slightly arched her back. He made no comment still and just began to thoroughly massage and grope her breasts.

Don moved his finger in slow, deliberate circles, kneading the soft flesh beneath Summer's hoodie. He varied his touch - sometimes using his whole palms to cup and squeeze her breasts, other times focusing on her sensitive nipples with gentle pinches and tugs.

Summer's breathing grew heavier as Don continued, her chest rising and falling more rapidly under his hands.

As the pleasurable sensations built, Summer began to squirm slightly in Don's lap. Almost unconsciously, she began to subtly rock her hips, grinding softly against him.

Don could feel the heat of her core through the thin layer of her shorts and made him to also start becoming aroused.

Summer's soft moans became more frequent, little gasps and whimpers escaping her lips. *Mmm~* "Don..." she sighed, her head falling forward slightly and her grip on his shoulders becoming firmer.

Don felt Summer's movements becoming more urgent, her soft gasps filling the air between them. He slowed his movements, looking up at her flushed face and asking gently, "Do you want me to stop?"

Summer's eyes fluttered open, meeting his gaze. She bit her lip, hesitating for a moment before whispering, "No..."

"Alright," Don nodded, his hands still resting on her chest. "Can I lift your hoodie up?"

Summer nodded silently as Don's fingers grasped the hem of her hoodie. He slowly lifted the fabric, revealing her smooth, tanned skin inch by inch.

As her breasts came into view, Summer turned her head to the side, avoiding Don's gaze. Her grinding motions also stopped as she became more aware of her exposed state.

Don could see the pink flush creeping up her neck and cheeks and it only added to his arousal. A part of him couldn't believe this was happening. His sister, was now sitting in his lap with her breasts exposed.

Finally, Don decided to comment on it. "You have really nice tits, sis," he said in a low voice, emphasizing on the word 'tits'. As he said this, he held one firmly in his hand and gave it a firm squeeze.

Summer let out a soft gasp at his touch, but still refused to look at him. She could feel the heat radiating from her chest and she knew that she was completely turned on by Don's hands on her body.

"Don?" she asked hesitantly.

"Yeah?" Don responded, his eyes locked onto her chest.

"Do you...do you think they're too small?" Summer asked quietly, bracing herself for an answer she didn't really want to hear.

Don lifted his head up to meet her gaze and saw the insecurity in her eyes. Given how beautiful and well shaped she was, he was surprised to see that she had this type of insecurity. But given how blessed their mother was in the chest department, it seemed reasonable for Summer to feel lacking in that aspect.

"No way," he said firmly. "They're perfect."

Summer's shoulders visibly relaxed at his words and she let out a small sigh of relief. She then looked back down at his hand on her breast and felt a wave of arousal wash over her again.

Without another word, Don continued massaging and kneading both of Summer's breasts as she sat there panting softly, trying her hardest to not moan.

Her nipples were now hard peaks under his fingers and he took turns tweaking them gently between his thumb and forefinger.

Summer's breath hitched every time he touched them and she found it hard to keep quiet. She wanted to moan and scream out loud, but the thought of how Don might react made her hold back.

As Don continued to massage Summer's breasts, he couldn't help but feel a surge of arousal himself. He could tell that she was enjoying his touch and the thought of taking things further crossed his mind.

'Should I take the risk?' he wondered. He knew that if he made a move now, there was no going back. But seeing how turned on Summer was, it seemed like she might be open to more.

So, without warning, Don leaned in closely to her, placing his mouth on her neck and kissing it softly.

*Mm~!!* Summer, caught off guard by this, couldn't help but let out a soft moan at the sensation. But she made no efforts to stop him or resist and even tilted her head to give him better access.

His hand continued massaging her breast while his mouth moved down to her collarbone, kissing and nibbling it gently.

*Huff~* *huff~* Summer's breathing became more erratic as she felt a wave of pleasure wash over her.

Don took this as a sign to continue and he moved his mouth down further to one of her exposed breasts. He sucked on her nipple gently before flicking it with his tongue.

"Oh Donnie~ *uh~*" Summer let out a loud gasp at the sensation and arched into him, wanting more of his touch. Don happily obliged and moved his attention to her other breast, giving it the same treatment.

Summer's moans became louder and she couldn't help but start grinding against him in pleasure.

"Don..." she muttered, wanting more but not sure how far they should go.

Don pulled away from her chest for a moment and looked up at her. "Summer," he whispered. The moment he did so, Summer suddenly leaned in and captured lips in a passionate kiss. *Mmm~*

Without hesitation, Don kissed her back just as fiercely as their tongues wrestled together. She could feel Don's erection pressing against her thigh and it only turned her on even more.

Her hands ran through his hair as they continued to kiss, their breaths becoming heavier and more urgent. Don's hands roamed over her body, tracing every curve and eliciting moans from her. *Mm~* *uh~*

Finally breaking the kiss, Summer looked deeply into Don's eyes with desire and longing.

"Donnie…" she whispered, almost pleadingly.