Natalie interrupts it

Margaret continued to finger herself in the shower, unable to comprehend why she was feeling so horny all of a sudden. Slight moans started to leave her lips as she kept masturbating, but she was suddenly interrupted by a knock on the door of her bedroom.

"Sis you okay? You came in a hurry and locked yourself in here. And isn't it a bit early?" Natalie asked through the door, and a terrified Margaret quickly stopped fingering herself. Luckily the door was locked, so Natalie wouldn't notice she had stripped.

"I have some break time before my next class, and I felt like resting here for a bit. Had a bit of a heavy morning," she quickly explained, trying her best to not sound agitated or horny, despite being quite a bit of both.

"Oh, alright, I left you some rhubarb juice in the kitchen if you want some before you head back to college," Natalie responded before leaving, heading back to the living room. With a sigh, Margaret headed straight back to the shower and continued masturbating, unable to stop herself, especially as the itch was getting pretty bad.

She did her best to stifle her moaning so Natalie wouldn't hear her as she continued, also teasing her nipples to alleviate their itch too, which only brought her more pleasure. Margaret considered herself a composed, calm person, so it shocked and humiliated her even more that she had been sent into such a frenzy of masturbation and thinking about sex. About how the hook-up culture she hated could get her some quick, casual sex with some stranger, with no consequences, and how much she wanted it to happen. It horrified her, but she could do nothing other than satisfy her primal urges.

In this state, it didn't take long for her to orgasm, a loud moan leaving her lips as she did. She was mortified that Natalie might have heard her. However, she didn't seem to have, as Margaret heard nothing as she gathered herself, got up from the floor and took a quick shower. After that, she got the same clothes from before back on, feeling ready to head back to school.

She quickly drank the juice in the kitchen before heading for the front door. Just as she was leaving, Natalie turned to look at her, a mischievous grin in her face.

"Remember sis, don't think about sex," she playfully told her as she left, red slowly taking over Margaret's face as she wondered if Natalie had heard her moan from before. Feeling incredibly embarrassed, Margaret headed back to the college just in time for her next class, which unfortunately was with a male-only class, which she feared might make things worse. Unfortunately for her, the itch was now returning with even more intensity, and the thoughts of sex in her mind were stronger than ever.