This story spans a few different categories. The domination theme is rather mild, but I still think it best belongs in this category. A big thanks to Ginger_Scent for her very valuable editing comments.
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You work with what you got. That's what Sara had concluded, and the fact that her breasts were on the tiny side didn't bother her anymore. Why should it? They were cute, and whatever she might be lacking on that end, nature had more than well compensated her with the most perfectly round ass. As she developed her figure, she had been embarrassed about her tush, thinking that it looked oversized and weird against her otherwise slim frame. But the embarrassment faded into acceptance, and then turned into pride. Now at 22, she knew her ass was sexy, and she increasingly enjoyed the thrills of wearing tight fitted skirts or pants to accentuate its round shape.
Marie and Sara met through the local gym. Even though Marie was eight years older, they became good friends. Neither of them had any siblings, so they had developed a big/little sister dynamic neither knew they had been missing. They sometimes joked about how they had adopted each other. No one would however take them for sisters by their appearances. Marie had long, dark curls that matched her deep brown eyes well whereas the blue eyed Sara kept her straight blonde hair comparably short. Marie was curvy and nearly a head taller than her petite little friend. Petite besides her perky bum that is. Not that Marie had any problems with her own ass, but when she wanted to look sexy, she would primarily emphasize her large breast.
The age gap between the two women wasn't huge, but it became more significant between Sara and Marie's boyfriend, the 39-year-old Michael. It would have been pushing it to say that Sara and Michael were friends per se, but they enjoyed each other's company when they met. Michael had been a bit skeptical about socializing with someone so much younger than himself, but he soon realized that he found it rewarding. It wasn't because Sara was mature for her age - that's rarely the case with anyone as far as he was concerned. Rather, she seemed to be comfortably and confidently acting her own age, and that made her interesting to spend time with.
"Wow, that's so old!" Sara's blurted out to his face when she learned Michael was close to 40.
Sure, he looked older than the guys her own age, but she had guessed he was younger than that, assuming he was about the same age as Marie. Perhaps it was hard to tell with his beard, even though he kept it quite short. Sara didn't have a thing for older guys in general, and she probably wouldn't have looked twice at him if it hadn't been for the fact that he was Marie's boyfriend. She thought Marie was awesome, and had been curious to see what kind of guy he was to attract her surrogate big sister. Observing him in that light, she had to admit she found him attractive. He was smart and far more sophisticated than she was used to, not to mention physically appealing with those broad shoulders and his cute smile. He was manly, but far from macho.
She knew he was just old in comparison to herself, but still started making a point out of teasing him for it, sneaking in a comment whenever she found a way to do so.
"Hey, watch your back old man."
"Don't eat that, it's not good for your cholesterol."
"Shall I get you your walker?"
He took the first few comments on the chin, but soon started retaliating, making the point that she was young and inexperienced.
"So, Sara, what do you want to be when you grow up?"
"Is that your tricycle parked outside?"
It was all in good fun. Or was it too much fun? Marie had picked up on a flirtatious tone within their back and forth teasing. She felt she should be bothered by it, but strangely found that she didn't mind. Perhaps it was because she trusted them both, and she also thought that as long as they acted like that in front of her, they weren't doing anything behind her back. In the back of her head, she even had a sense of pride that Sara obviously found her boyfriend attractive. And why wouldn't she? He was a sexy man in his own ruggedly handsome way. Height probably wasn't an issue for her short blonde friend, but Marie was glad that he was at least slightly taller than herself. Her height had been an issue when she was young and she still liked the idea of being shorter than her man.
Then again, with a pair of high heels they were at eye level. That had its perks when she wanted to live out her desire for being the dominant part in their sexual interactions, a thrill she had discovered lately.
As much as he tried to be discreet about it, Marie also noticed the glances Michael was giving Sara, especially those directed to her beautiful bum. For reasons she didn't quite understand herself, she didn't mind. But a man had to be blind not to look at that, and even most women couldn't help themselves. Marie was no exception. It was actually the first thing she noticed when she initially saw Sara at the gym. It had been impossible not to stare at that ass, moving tauntingly on the treadmill. Even after they got to know each other and went there together, Marie sometimes half subconsciously picked a machine behind her friend. No one could deny that Sara's ass was a thing of beauty, and the way it moved in those revealing tights was nothing short of mesmerizing.
The age difference between Sara and her befriended couple became obvious when comparing their living arrangement. Marie and Michael owned a house, whereas Sara had very little stability in terms of housing. As a university student, she was constantly switching from one affordable short term accommodation to the next. Sometimes there would be a gap between moving out of one place and in to the next, and Michael and Marie always let her stay in their guest room when this happened. It allowed Sara to quickly become close to the couple.
Michael hadn't been particularly keen on having a long term house guest the first time Marie proposed it. Yet, he didn't like to argue against his girlfriend, especially when he knew she was doing the right thing. His always-so-caring girlfriend had to look out for her adopted little sister. He soon realized that he actually enjoyed having Sara around. Her bubbly and cocky attitude brought some energy into the household. And he'd be fooling himself if he didn't admit that having another attractive young lady around the house also had its perks. As she got comfortable around the house, she occasionally even started walking around in just her underwear, making it impossible not to stare at her beautiful ass. It had inspired many dirty fantasies. He tried not to be obvious with his glances, but he was sure Marie noticed sometimes.
As much as Sara liked the attention, she had originally thought that showing off her goods in just her panties might be overstepping some boundary. She had no intention of violating Marie's trust. Yet, Sara felt that her friend was actually sanctioning it. The first time Michael had seen her in her panties, it had been unintentional. Michael was out one evening and Marie and Sara were at home, casually watching some TV before going to bed. As it was just the girls, Sara followed Marie's lead and just wore a singlet and panties. When Michael got home earlier than predicted and joined them in the couch, Sara didn't think about what she was wearing. But as she got up to get a drink, she realized that she might be inappropriately dressed.
"I should probably put something on," she said.
"Nah, don't worry about it," Marie responded and continued with a playful tone. "I'm sure Michael doesn't mind."
