Luke makes an excuse to leave, needing to relieve his pent-up desire.

Luke took a deep breath, trying to steady his racing heart. The sight of Emma, her curves, her movements, had ignited a fire within him that he couldn't ignore. He knew he had to get out of there, had to find a release for the desire that was consuming him.

"You know what, Emma, I just remembered I have something to do," Luke said, his voice barely steady. "I'll, uh, I'll finish the laundry later."

Emma looked at him, a hint of concern in her eyes. "Are you sure you're okay, Luke? You look a little...flustered."

Luke **** a laugh, running a hand through his hair. "Yeah, yeah, I'm fine. Just, uh, gotta go. Thanks for your help."

He hurried out of the laundry room, his heart pounding in his chest. He rushed up the stairs, his mind racing with images of Emma, her body, her breasts, her everything. He could feel his cock straining against his pants, aching with a need that was almost painful. His heart pounded in his chest as he made his way to Emma's room, his mind racing with anticipation.

He slipped into her room, his eyes scanning the space for any sign of her underwear. He spotted a drawer slightly ajar and hurried over, his hands trembling as he pulled it open. Inside, he found a treasure trove of lace and silk—Emma's most intimate garments. He grabbed a handful, not bothering to look at what he was taking, his heart racing as he rushed to his room, locking the door behind him.

He dumped the clothes on his bed, his breath coming in ragged gasps as he took in the sight before him. He had grabbed two of Emma's t-shirts, a pair of yoga pants, a matching bra and panty set, and a pair of earrings. He decided to take it slow, to savor the experience.

He picked up the Taylor Swift merch t-shirt, the fabric soft and worn from frequent use. He pulled it over his head, feeling his body begin to shift and change. He looked down, watching as his body shrank, his waist narrowing, his hips flaring out. He felt his hands change, his fingers becoming long and slender, his nails painted a vibrant red, just like Emma's. He touched his stomach, feeling the smoothness of his skin, the curve of his waist. He was becoming Emma, and the sensation was intoxicating.

He stripped off his pants, his cock already hard and aching with need. He looked down at his sister's hands, the red nails a stark contrast against his pale skin. He wrapped his fingers around his cock, feeling a jolt of pleasure course through him. He began to stroke himself, slowly at first, then faster, his breath coming in ragged gasps. He had never felt this much pleasure before, the sensation of his sister's hands on his cock sending waves of ecstasy crashing over him. He came quickly, his body convulsing with the **** of his orgasm.

But he wasn't done yet. He grabbed the bra, his heart pounding with anticipation. He put it on, feeling his chest begin to fill out, his sister's breasts growing on his own chest. He touched them, feeling their weight and softness, a moan escaping his lips as he squeezed them gently, his fingers teasing his nipples, sending shivers of pleasure coursing through him. He lifted one to his mouth, sucking on the nipple, feeling a shiver of pleasure course through him. His other hand snaked down to his cock, stroking it in time with the movements of his mouth. The sensation was overwhelming, the dual pleasure of his sister's breasts and his own cock sending him spiraling towards another orgasm.

He grabbed the panties next, sliding them up his legs, feeling the smooth fabric against his skin. He watched as his cock began to shrink, replaced by a smooth, shaved pussy. He touched himself, feeling the wetness that was already there. He slid a finger inside, feeling the warmth, the tightness. He added another finger, fucking himself slowly, his body writhing with pleasure.

He pulled on the yoga pants, his legs and ass transforming to match Emma's curves. He reached for the earrings, the final piece of the puzzle. As he put them on, he felt a warmth spread through him, his face transforming to match Emma's. He looked in the mirror, his heart pounding as he saw his sister's reflection staring back at him. He was Emma, completely and utterly. And he loved it.

He lay down on his bed, his heart pounding with excitement and desire. He touched himself, his fingers sliding over his pussy, feeling the wetness that was already there. He let out a soft moan, his body responding to his touch. He slipped a finger inside, feeling the warmth, the tightness. He added another finger, fucking himself slowly, his body writhing with pleasure.

He closed his eyes, imagining it was Emma's hand between his legs, Emma's fingers inside him. He could see her in his mind's eye, her smile, her laugh, her everything. He could feel her, her touch, her love, her desire. It was intoxicating, overwhelming, all-consuming.

He moved his fingers faster, his body tensing as he chased his release. He could feel it building, the pleasure, the ecstasy. He was close, so close. He let out a low moan, his body shaking as he came, his pussy clenching around his fingers, his body convulsing with the **** of his orgasm.

He lay there for a moment, his body still trembling with the aftershocks of his release. He looked down at his body, at Emma's body, a sense of awe and wonder filling him. He had never felt anything like this before, never experienced anything so intense, so powerful, so...right.

He came again, his body convulsing with the **** of his orgasm. But he craved more. He wanted to experience everything, to feel every sensation, to explore every inch of his sister's body. He knew he was playing a dangerous game, but he couldn't stop now. He was in too deep, lost in a world of pleasure and desire. And he never wanted to leave.

{What does Luke do next?}

Option 1 - Masturbate again.

Option 2 - Luke decides to try on someone else's clothes.

Option 3 - Luke decides to take a break, feeling overwhelmed by the experience.