I know I should be working on my other stories right now, but I came up with this idea and my fingers just couldn't help it. It will be fairly short, only one or two parts. This is just a very short teaser, because I'm not sure anyone will actually want to read this since it's so A/U.

Summary: Kind of a what if story if Helga was a couple years younger than Arnold and had a brother Arnold's age. Robert Pataki Jr (Rob) is one of Arnold's best friends. While Rob's little sister, Helga, always seemed to be around it but isn't until Arnold is seventeen that he sees her in a whole new light. Not wanting to lose a friend, Arnold fights his attraction. Story told from childhood to adulthood.

The Sister

Arnold Shortman met Rob Pataki when they were three. They were in the same preschool together and quickly became friends. Rob was one of the oldest members of the Urban Tots preschool class, his forth birthday being in the third week of September. Rob's parents, Bob and Miriam, threw him a birthday party and invited all his new friends, Arnold included.

Arnold had never been to a birthday party, so he was curious about what one would be like. With his birthday only two weeks away and his grandparents throwing him own little party. He wondered if his own party would be any different. When Arnold arrived at the Pataki's he knew his party would be much different. As he stood in the living room he realized every single kid in their class was there, including all of the girls! Arnold's grandparents said he could invite three of his friends over for his party. He had decided on Rob, Gerald, and Sid.

While his classmates were running around the living room Arnold took a few moments to take in his surroundings. Rob's mom was trying to round up all the kids to play a game and he could hear Rob's dad yelling at the television in a different room. There was a playpen set up in the corner of the living room with Rob's little sister struggling to reach over the edge of the playpen to a doll she must have dropped. "Ma! Ma!" She pulled out her pacifier to call out to her mother. Arnold looked over at Mariam, who seemingly didn't hear her daughter's cries.

Arnold quickly walked up to the playpen, picked up the doll, and handed it to the little blonde girl with the curly hair. "Here you go." She smiled up at him before popping her pacifier back in her mouth and hugging the doll. "How old are you?" He smiled when he noticed the little girl smile behind the pacifier she was sucking on. She held up one finger. "You're one?" She nodded as she sat down with her doll.

"Hey Arnold!" Rob ran up to him, "I brought you a cookie." He looked over at his little sister. "Don't worry Helga I brought you one too." He handed Helga a cookie. Helga quickly ripped the pacifier out of her mouth before Rob handed her a cookie. "Come on Arnold, let's go play. My mom is setting up pin the tail on the donkey."

"Bye bye Helga." Arnold wave at her as he walked away with Rob.

Helga smiled widely, crumbs from her cookie falling from the corners of her mouth. Her left hand waved back, "Bye bye." Her smile lasted until Arnold and Rob were out of sight.