False alarm

Aaron jumped at the loud knocking coming from his door.

"Don't come in!" he yelled, his heart skipping a beat. "I'm uh... changing."

"Do you know where Natalie is?" Emily asked through the door.

"Haven't seen her."

"Oh. Do you think I can have the shower now?"

"It's all yours," Aaron said. "She said she's done using it."

"Okay," Emily replied, her footsteps fading down the hall.

Aaron shook his head. Enough mucking about. He pulled open the hole in his sister's back, sticking one leg in and pushing it all the way down to the toe. It was a snug fit, and he felt the skin tightening against his own as his toes slid into place.

His leg felt strange, and he pulled the rest of the skin to one side to get a better look. What greeted his amazed stare was his sister's own leg, fully fleshed out but with no sign of his own mass. Painted toes wiggled on the end of dainty feet, the cool air of his room against her waxed legs being the cause of Aaron's sense of strangeness. He ran a hand up and down 'his' thigh, marveling at the sensation.

With new enthusiasm, he **** his other leg into the skin, pulling Natalie's waist up to just below his crotch. He wanted to savour this, bit by bit.

In fact, he thought to himself. I'll need to try separating the limbs and stuff at some point. Put someone on piece by piece.

Looking in his mirror, he saw himself looking back, completely normal but for the feminine legs beneath a skirt of crumpled skin held up in each hand. With his heart beating madly, he slowly pulled the suit up to his waist.

He felt the compression of his torso first, as his body gave way under the skin's tight fit. The mild pressure was soon overridden by the sense of something squirming beneath his legs as he lost sensation in his dick, instead feeling a warm, internal tunnel suddenly burrow into his body. A trembling exploration between 'his' legs confirmed that he was now the new owner of his sister's vagina. He concentrated on flexing his abdominal muscles, the foreign sensation of his pussy clamping on itself sending shivers up his spine.

He had to slide his arms in now, working his hands into the fingertips and feeling them compress like they had on his legs. The empty bags of skin against his chest swelled, gaining weight and sensation at the same time, causing Aaron to become slightly light-headed as his blood-flow was suddenly altered. The final opening in the suit ran up the back of Natalie's head, and Aaron held his mouth open as he guided his face towards the holes he could see in the skin.

His eyes became hers, his nose slid into place and lips merged together as Aaron heard 'his' breathing come out in sexy, shallow moans. The glorious sensation of gaining full possession of 'his' sister's body washed over 'him', the thrill of seeing her body through her eyes eliciting a delighted giggle from 'his' lips.

"Hey," Aaron whispered as sexily as he could. "I'm Natalie, and I'm a really slutty bitch."

Aaron collapsed into giggles, glad that Emily wouldn't be able to hear 'him' over the sound of running water.

Emily. Now there's an idea.

"I think I owe my dear little sister an apology," said 'Natalie.'

Emily always had been trusting for her age and Natalie was pleased to find the bathroom unlocked. The door to the shower itself was fogged over with steam, and it wasn't until Natalie had opened it and stepped in that Emily saw her and jumped in shock.

"Nat!" she gasped, shrinking back in fear. "I'm sorry, I thought... Aaron said you were finished and I... I mean, I didn't realise..."

Natalie took her cowering sister's head in her hands and planted a tender kiss against her forehead.

"It's okay, Emily. I'm sorry I yelled at your earlier. Aaron has... spoken to me about a few things, and I think it's time for me to be a nicer sister."

Emily's look of confusion mixed with hope was delightful to see.

"That is, as long as you're willing to be nice to me, too."

"I... um... of course! Sure! What did you-"

Emily didn't have time to react as Natalie pressed their lips together, holding her little sister against her body as she wormed her tongue into the girl's mouth.

Emily's eyes widened in shock as she realised what was happening to her.