Karla
Karla spent little time at home. She had several friends that liked to hang out together and she preferred the variety of interactions that came with that group. Unknown to all but her two closest friends, Karla's sexual interests started to steer towards other young women. She dated one boy in high school for almost four months and still went out on occasional dates whenever one asked her out, but never developed a close, long-term relationship with any of them. Her two friends also happened to be her episodic lovers, thus her secret remained safe with them. Most of the people they knew, including their own families, would not have cared much one way or the other to find out the three girls were involved in lesbian sex. However, there were enough assholes in school and around town who would have made their young lives as uncomfortable and painful as possible had the girl's sexual preferences become widely known.
Like Karla, neither of the other two young women was currently dating a boy, even though one of them, Jenna, had just ended a six-month relationship with a boy she had known since kindergarten. For the most part, the three girls seemed to agree that boys their age were still too immature to be interesting. The girls liked each other a lot, but had different interests and none of them felt romantic love for either of the others.
All three girls were attractive - Karla was easily the plainest of the three but was often told that she had the perfect body and grace to be a model. However, boys just seemed to sense that the girls, while attractive, nice, and pleasant to be around, were still just a little "off". The lack of serious attention from a boy didn't bother the three in the least. They were social creatures who enjoyed each other and most of the people they met.
When they did feel the need to scratch their sexual urges, two of them would often get-together at a home where parents and any siblings were away, and they would satisfy each other. Sex was never an activity that consumed much of their thinking and was more recreational and experimental in nature when they did get together sexually. There was never any jealousy between the three, and they even enjoyed a sexual threesome together at times just for a change of pace. However, they preferred their relationship as "just friends" - it seemed like a lot less work and a lot less stress.
It was during one of these afternoon hook-ups that Karla's secret came out.
Karla and Jenna originally planned to use Jenna's home for their afternoon romp, but when they got there, both of Jenna's brothers were there with some of their friends playing video games and drinking. Making a quick ad-lib, Karla volunteered her bedroom. Her mother was the only one home and she would be in her daily workout during most of the visit. After her workout, her mom always went back to her own room to shower and change, and rarely intruded on Karla.
Jenna agreed and the two girls hurried to Karla's house. As promised, Lena was in her workout when the two girls arrived, and Karla's brother, Kris, was away somewhere with his own friends. Locking her bedroom door behind them, Karla led Jenna to the bed and the two girls were quickly naked and intertwined together.
Lena finished her workout, and went to her bedroom to get cleaned up. After toweling off from her shower, she automatically went to her bed to open her laptop and check the security camera in her son's room. As soon as she saw his room was empty, she remembered that he was out with friends. Disappointed, she started to close the app, but happened to look at the video feed from her daughter's room.