"Oh my goodness, William... I think I need to sit down for a sec..." she admitted sheepishly, finally unable to ignore the growing ache between her thighs. As she slowly lowered herself back onto the couch, her movements were unsteady and clumsy, as if her body was fighting against her will. Aiko couldn't help but glance down at her crotch, noticing the visible dampness seeping through her thin yoga pants. She quickly looked away, embarrassed by her own reaction.

"What's wrong, Onee-chan?"

My cheeks flushed bright red as I realized what had happened. I tried desperately to hide my embarrassment while attempting to explain myself. "O-oh, nothing's wrong! It's just... uh... muscle cramps," I stammered, still avoiding eye contact with him. My heart raced in my chest.

Nervously, I glanced towards the kitchen before looking back at William. "Hey, do you want something to drink? Maybe some water? Or tea?" I asked hastily, hoping to divert his attention away from my current predicament.

"L-Liabe..." she whimpered, unable to meet his gaze as he continued to fondle her breasts and tease her sensitive nipples. Her disorder made it impossible for her to focus on anything else; all she could feel was the intense pleasure building inside of her as their bodies pressed together.

With a gasp, Aiko followed him down onto the bed, their lips still locked in a passionate kiss as they tumbled onto the soft mattress together. Her disorder made every touch impossibly intense; she could feel herself growing wet and sensitive all over as he continued to stroke her breasts and tease her nipples while one of his strong hands moved lower, sliding down her stomach and further south...

Her lips brushed against his in a feathery caress before pressing fully against his mouth. She could taste the mint of his toothpaste on him and felt herself grow even more aroused. Her tongue snaked out, tracing the outline of his lips until they parted and she was able to explore the warmth within.

Her disorder made it difficult for her to focus on anything other than the sensations coursing through her body as he moaned into the kiss.

Her heart raced faster as she felt his tongue meet hers, tangling together in an erotic dance. She moaned into the kiss, her disorder making it impossible for her to control herself as desire coursed through every fiber of her being. Her hands trembled as they moved up and down his back, feeling the warmth and strength beneath her fingertips.

Her nipples were so hard now that even the slightest touch sent shivers of pleasure through her body.