Luke asks Emma about her day, trying to keep the conversation casual.

Luke took a deep breath, trying to calm his racing heart and the growing heat in his body. He decided to keep the conversation casual, trying to hide his arousal and gather information. "So, Emma, what's your plan for today?" he asked, his voice steady despite the turmoil inside him.

Emma turned to him, a soft smile on her lips. "I'm going to visit Holly, my college roommate, and spend the night at her place," she said, her eyes lighting up at the mention of her friend. "We're going to have a girls' night in, watch some movies, maybe do some face masks."

Luke's heart pounded in his chest as he listened. This was his chance, his opportunity to explore his power fully. He knew Emma was their parents' favorite, and she was never denied anything. He could become her, experience her life, her freedom. The thought sent a shiver of excitement and desire coursing through him.

"That sounds fun," Luke said, trying to keep his voice casual. "Hey, could you do me a favor? Could you tell Mom and Dad about your plans? I don't want them to worry."

Emma raised an eyebrow but agreed. "Sure thing, little bro. I'll tell them before I leave."

Luke watched as Emma finished sorting the laundry, his mind racing with plans and possibilities. As soon as she left the room, he rushed upstairs to her bedroom, his heart pounding with anticipation.

He opened her drawers, his fingers brushing against the soft, silky fabric of her underwear. He pulled out a pair of sexy net silk panties, a black pantyhose, and black latex shorts. He quickly undressed, his cock already hard with excitement. He slipped on the panties, feeling the soft fabric against his skin. A warmth spread through him, and he watched as his body transformed, Emma's curves filling out the fabric.

Next, he pulled on the pantyhose, the tight fabric smoothing over his legs, hugging his new curves. He stepped into the latex shorts, the material clinging to his ass, accentuating his hips. He could feel the fabric rubbing against his pussy, sending jolts of pleasure through him. He watched in awe as his legs transformed, becoming longer, more shapely. He looked down, seeing the outline of Emma's pussy lips, the curve of her ass cheeks.

Finally, he put on Emma's black V-shaped sleeveless silk blouse, the fabric soft and cool against his skin. The blouse clung to his new breasts, the V-neck revealing a hint of cleavage. He touched them, feeling their weight and softness, a moan escaping his lips as he squeezed them gently. He clipped Emma's hair clip into his hair, feeling his face transform, his features shifting to mirror his sister's.

Luke looked at himself in the mirror, his heart pounding with excitement and desire. Emma stared back at him, her curves hugged by the latex and silk, her nipples visible through the thin fabric of the blouse. He touched his face, feeling the softness of his skin, the fullness of his lips. He ran his hands over his body, feeling the weight of his breasts, the curve of his hips, the smoothness of his legs.

He took a deep breath, steeling himself for what was to come. He went downstairs, his hips swaying with each step, his breasts bouncing gently. He found his mother in the kitchen, her back turned to him as she prepared dinner.

"Mom," he said, his voice soft and sweet, a perfect imitation of Emma's. "I'm going out tonight, okay? Holly invited me to a birthday party."

His mother turned, a smile on her face. She looked him up and down, her eyes lingering on his curves. Luke could see the approval in her gaze, the pride. He knew he had her fooled.

"Of course, sweetheart," she said, her voice warm. "Just make sure to be back by 11 pm, okay?"

Luke nodded, a smile on his lips. He walked over to his mother, his hips swaying, his breasts bouncing. He leaned in, kissing her on the cheek, feeling the softness of her skin against his lips.

"I will, Mom," he said, his voice a soft purr. "I promise."

He turned and walked away, his heart pounding with triumph. He had done it. He had become Emma, and no one suspected a thing. The world was his oyster, and he was ready to explore. The cool night air hit him like a wave, sending a shiver down his spine. He looked down at his body, at Emma's body, and a thrill coursed through him. He could feel the weight of her breasts, the sway of her hips, the smoothness of her skin.

{What does Luke do next?}

Option 1 - Luke decides to explore the town as Emma.

Option 2 - Luke decides to visit a club, using Emma's ID to get in.

Option 3 - Luke decides to meet up with Emma's friends, pretending to be her.