"Hey! How does this look?"
Mark finished pouring the orange juice into his glass and turned around to his sister's voice. She was standing in the door way wearing a flowered sundress. She had one hand on her hip and the other arm in the air...striking a pose. "What? New dress?"
"Yeah. What do you think?" asked Michelle.
He looked up and down at the dress: A white dress with small pink and blue flowers all over it. "It's okay. Looks like a dress for a lawn party or going to church." He took a sip of his orange juice.
"That's the right answer! It's for the party!" She turned and walked away from the kitchen. Mark could hear her running up the stairs to her bedroom. His 18-year old sister was going on vacation with her friends next weekend. Apparently, she went shopping for new clothes.
He grabbed his glass of orange juice and walked toward the stairs to his bedroom. It was good to be home for the summer from college. One year to go and he would have his degree in engineering. As he passed his sister's room, he could hear her moving around behind the closed door. He got to the doorway of his bedroom and his sister opened her door. "What about this one?"
He stopped and took a sip of his orange juice as he turned. She was wearing a long, sky blue dress with a knot tied at the top leaving one shoulder completely bare. "Is that for the beach?"
"I planned to wear this at the luau. Not good?" Her shoulders slumped.
He looked again. "No, it's fine. I've only seen girls wear that to the beach. The color looks good against your tan." She clapped her hands, bounced back into her room, and closed the door with loud thud. He said that last part because he could tell she was looking for approval and it was true; she really did look good in it. Her skin color plus her blondish hair worked well with the blue. Like him, she played sports during school, which made clothes shopping her favorite hobby.
He set his half finished glass on the desk and turned on the computer. He plopped in the chair and started reading his email. There was a knock on the door and he turned. Michelle was there wearing a one-piece aqua marine bathing suit. "Wow", he said softly.
"I guess this is okay, huh?" She stepped into his room looking down at herself.
She stood there, bare foot, the color a striking contrast to her tan. The cut of the bathing suit was amazing. The openings for her legs went up past her hips and the top scooped down showing off her ample cleavage. Michelle definitely got her looks from mom's side of the family, Mark thought. Almost looks like Aunt Sylvia. "You will definitely turn heads with that on."
"Mom told me I couldn't buy a two-piece. Please don't tell her about this one. She might not like it either."
"She didn't want you showing off to much, did she?"
"Ohmygawd!" She rolled her eyes.
Mark had to laugh also. "Guess mom hasn't been on the beach in a while. That looks fine."
"She thinks I'll end up on Girls Gone Wild or something," Michelle said and turned to leave the room.
"Wait!" Once again, Mark was caught by surprise.
Michelle grabbed the door frame and leaned into the room, "What?"
"Come back here a minute."
She took one step back into his room and looked down at the bathing suit, "What is it?"
"Turn around." He made a circular motion in the air with his finger. She slowly turned around. "You had better make sure to wear plenty of sunscreen." The back of her suit was practically missing. The "V" of the back came down to the lower part of her back and the high cut legs showed off her firm ass almost completely. The tan line wasn't glowing, but it was obvious where the sun typically tanned her butt.
She looked over her shoulder trying to see her back then looked at him, "Well...it's a one-piece like I promised mom I would buy."
"Yeah...you're going to turn heads coming and going." He continued to stare. "Hey, is Rachel going with you? Get some photos of her on the beach." He smirked. Rachel is one of Michelle's classmates. Long dark hair, big boobs, great ass, and a year younger. Mark and Rachel have been flirting with each other for years.
"No way!" She stormed out of the room. "Ask her to send them."
Mark went back to reading email. His mind drifted to Rachel wearing Michelle's one-piece. His cock was growing as his thoughts progressed to Rachel wearing the little bikini he has seen her in a few days ago.
"Okay, I need your help," Michelle's voice came from the hallway.
"What?"
"I can't get this dress zipped in the back, but I don't want you to see it until it is zipped."
"Okay. How is this going to happen?"
"You have to close your eyes. I'm going to come in, you zip me up, and I'll tell you when to open your eyes."
"How did I get volunteered for this fashion show and wardrobe malfunction?"
"Tsk. Oh, come on."
Mark moved his chair around to face the door. "Okay, my eyes are closed."
"You promise?" She peeked into the room. He was sitting in the chair with his eyes closed, his hands on his knees...and a bulge pushing through his gym shorts. Michelle was surprised. "Are you sure you're ready?"
"My eyes are closed. I'm ready." He sighed heavily. He could hear her walking into the room and stopped in front of him.
"Okay. Zip me up."
He reached forward with both hands and grabbed her hips. Out of instinct, he squeezed. "Oops."
Michelle felt the strength of his grip. "It's up higher and in the middle."
His fingers danced along the small of her back until both of his hands were together. He slowly moved them up her back feeling for the small metal clasp. He was tempted to open his eyes, but thought this was a bit funny and smiled.
Michelle could feel his fingers along her back. It was a strange feeling. She looked over her shoulder and could see his eyes still closed. "Why are you smiling?"
"This is funny and I feel a bit silly."
"This is serious. I want to make sure all my clothes fit right and won't make me look like a dorky high school girl."
"But you ARE a dorky high school girl." He laughed.
"Will you hurry up. The zipper is higher."
He slid his finger up the center of her back. His mind went to Rachel while he was doing this. He knew this was a mistake because his cock was getting harder and he was becoming more uncomfortable in his tight gym shorts. "I can't find the zipper. Where is it?"
"It's up higher." She liked his fingers moving up her back. She loved back rubs and this was starting to feel really good. "Move up about five inches."
"I can't reach sitting down." He put his hands on the arms of his chair and pushed himself up.
"Don't open your eyes!"
"I didn't." He reached forward and took hold of her shoulders. He could feel her warm skin on his hands and slid them along until he felt her neck.
Michelle closed her eyes. That felt sooo good. She leaned her neck forward when his fingers touched the nape of her neck.
Mark gently raked his spread fingers down her back trying to find the zipper clasp. There was a touch of fabric on his outstretched pinky fingers, but the rest of his hand felt his sister's warm back.
Michelle took a deep breath: That feels great! "Did you find it?"
He softly moved down until he felt the zipper's teeth and took hold of the zipper flap. He slowly moved the clasp up and shifted is weight trying to reposition his rigid cock. It didn't help.
Michelle let out a soft sigh when she felt the zipper close. "About time." She didn't really want the impromptu back rub to end. She turned to face him. "Okay...open your eyes."
He opened his eyes and found she was staring at him. He looked down and saw part of the black, sleeveless cocktail dress. His eyes were immediately on his sister's cleavage. Her breasts were squeezed into the dress like the bathing suit. "Wow."
"You're like all the boys," she huffed. "Stop looking at my boobs and tell me what you think of the dress." She stepped back. It was a typical black cocktail dress with a plunging neckline. He looked at her legs. If he didn't know better, he thought the dress was more like a miniskirt.
