Jessica had figured out the scheme in the first month, and set up her plan the second month. When she was ready, she asked Tomas, her boyfriend, if his brother Emil could meet them on their lunch date.
Tomas and Emil were twin brother socialites from Barcelona, and they were both Jessica's lover, though they thought Jessica didn't know that. She'd met Tomas at an elite New York club, fucked him that night, and established herself as his live-in girlfriend, by virtue of that first mouthful of cum.
Tomas treated her well; champagne, jewelry, helicopter rides to Fire Island, the works. He introduced her to his twin brother Emil, and Emil and Jessica hit it off. A little harmless flirting, a good-natured joke asking how alike they really were, and the brothers exchanges a knowing glance that Jessica noticed, but pretended not to notice.
They pulled the switch a week later, and though Jessica didn't catch it the first time, by the fourth time, she had a list of distinct differences. So she made a plan, bought a couple supplies, and fucked them both a few more times each. Then she had lunch.
Emil joined Jessica and Tomas on the balcony of their apartment overlooking the Hudson. They were dressed for an evening of clubbing, Jessica in a short black dress and matching choker. "Hello Emil, please join us. I have a little announcement."
"Hola, Jess" said Emil, pronouncing it almost like 'yes'. He sat across from his brother and crunched a celery stick.
"So," said Jessica, leaning against the balcony railing. "I'll just cut straight to the point. I know Emil has been fucking me."
The twins sat up, startled, exchanging glances. Tomas said, "Que-", but Jessica held up a hand stopping him.
"Don't bother. I know." She counted on her fingers. "Emil has hairs on the bottom of his balls, and Tomas doesn't. Emil leads with his middle finger when he's got his hand down my pants, Tomas starts with the index. When he's fucking me from behind, Emil takes a handful of my hair at the scalp. Tomas makes an impromptu ponytail, and uses it like a leash."