The CMCs asked Sea Swirl to come to their treehouse so she could help them earn their cutie marks.
She came, but she didn’t know how she was supposed to help them.
After some initial analysis, Scootaloo concluded that Sea Swirl’s cutie mark was a subtle way of telling her that her talent was 69.
And since she’s good at 69, she’s probably also just good at sex and synchronizing with partners.
Before Sisi could refute these allegations (plus she was shocked that she had been figured out), the three of them began to surround her, and as soon as she was about to say something, Scootaloo’s cock began to penetrate her mouth, Sweetie Belle settled underneath and began to penetrate her pussy, and Applebloom penetrated her ass.
After a moment of shock, stamping her hooves on the floor in protest, Sea Swirl’s mouth quickly adjusted to Scootaloo’s size, which only confirmed Scoot’s theory.
Sea Swirl’s magic allows her to mentally read her partners in terms of how quickly they will climax, which from her perspective can be compared to a progress bar in a system installer (lol).
And when everyone was at their peak, she tightened all of her tunnels and came first herself due to the fillies’ lack of technique, but also their brutality. They don’t know how to hold back and just go with their instincts. Like a stack of dominoes, the rest began to ejaculate one after another. And then they all switched positions a few more times until they got bored with the whorse, concluding that they couldn’t get CM the same way Sea did. It won’t stop them from harassing her in the foreseeable future though, not until at least they get bored of this peculiar mare.

imported from https://derpibooru.org/images/3772669