Usain Bolt did the most during and following the Rio Olympics, getting caught out there with several women despite having a girlfriend.

One woman, a 20-year-old Brazilian student whose picture surfaced in bed with Bolt, even gave a play-by-play account of her night with the world's fastest man.

Well, that being said, an Instagram model is alleging that Bolt's cheating ways began well before the Summer Olympics, which just ended last week.

Nailah Dillard told The Sun that she met Bolt in late 2013 and that the pair dated for a couple of years — until she realized that the nine-time Olympic gold medalist had a girlfriend, Kasi Bennett (pictured above).

“I don’t know if she knew about me, but he was following me on Instagram so it wouldn’t be hard to check," Dillard told The Sun about Kasi and Usain. “He’s not monogamous, and that’s a big reason why he and I ended. He’s the type of person who wants his woman to be faithful, but he wants to be open with other women."

Part of their relationship allegedly included a kinky request of a threesome from Bolt — something that Dillard says she shot down.

"I thought it was an odd and cheeky thing to ask," she told The Sun.

Upon seeing Bolt doing the most with all these women during and after the Olympics, Dillard says she even text-messaged him to exercise caution.

“'You are sleeping with all these random women. I hope you’re protecting yourself,'” she claims she told him.

Here is a shot and video of Nailah from her Instagram account.

Meanwhile, Kasi seemed to subliminally respond to her boyfriend's cheating via liking a fan's IG post favorably comparing her to the Brazilian student last week.

And she looked rather carefree in her own IG photo last week after a wave of Bolt's cheating reports, photos and videos surfaced.

Think Usain and Kasi's relationship will survive?

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