Rough Sex, Threesomes & Schoolgirl Outfits: Mistress Spills A-Rod's Kinky Fetishes

Alex Rodriguez cheated on Jennifer Lopez with a glamorous fitness model — and she's now spilling all his kinkiest sexual fetishes and fantasies!

RadarOnline.com obtained The National ENQUIRER's exclusive interview with A-Rod's mistress Lauren Hunter, who first met the former baseball player at an L.A. gym in 2011.

The two have kept in touch through the years, and Rodriguez, 41, most recently attempted to set up a raunchy hotel rendezvous with Hunter for May 17 — when he was in Kansas City watching his former team play the Royals and Lopez, 47, was in New York City shooting Shades of Blue.

Now, 34-year-old Hunter has spilled all of Rodriguez's sexual likes in her bombshell tell all.

According to Hunter, A-Rod dogged her relentlessly and when they would meet up they would enjoy wild 12-hour sex marathons.

"In bed with J.Lo, he's probably picturing me," boasted Hunter. "He likes me to always wear heels and lingerie and outfits, dress up as a schoolgirl. All the things I would do with him I wouldn't do with anyone else."

"I have done it with him. His biggest fetish is voyeurism. He would rather see me getting pleasure than him get pleasure. I've been on trips to New York and we've not even had sex, he's just pleased me. He gets himself off. It's just strange."

So is Rodriguez's way of working himself up about Hunter's past lovers.

"He always wants me to talk about a sexual moment, if it's a girl I've been with…an ex, he wants me to replay the story," she explained. "He likes to be jealous, it turns him on. He'll FaceTime me in the gym and just want to watch me work out. If I wore a camera all day he'd like it!"

In fact, the two often exchanged raunchy texts and videos with each other.

In one racy back-and-forth session on May 10, at 12:47 p.m., Rodriguez texted Hunter: "Face time later? I miss you."

Later, at 4:32 p.m., A-Rod wrote: "Are you home alone?"

She replied: "Is that where you wanted me … in my bed with a wet p***y?"

A-Rod responded: "Yes. Always babe."

The text exchange ended with an agreement to video call.

"He told me he tries not to be on his phone when he's with Jennifer but says, 'You can still text me.' I'm like, 'What are you worried about? I'm not even jealous, we have our own situations,' it's just weird."

Hunter added: "I truly believe he's keeping a side of himself from her."

Pick up the latest issue of The National ENQUIRER for all the dirty details on Alex's sordid affair with Lauren behind Jennifer's back.