WTF! JON WAS SLEEPING WITH THE BABYSITTER TOO!

Jon Gosselin's tangled web of lies and affairs is becoming more complicated by the moment than that of Lindsay Lohan's.
Despite the reality show dad insisting he has been faithful to his 22-year-old girlfriend, Hailey Glassman, a wrench in the form of his children's baby-sitter has been thrown into his complicated love life.

Stephanie Santoro, the former waitress and single mom who was hired as the Gosselin family's baby-sitter, is now coming clean about their affair in a new interview with In Touch magazine.

Santoro, 23, says she first met Jon and wife, Kate, a few years earlier when they brought their twins Cara and Mady, now 8, to a twins convention.

"Jon and I became friends when I was working at [Pennsylvania bar] Legends, and he came in sometimes," she said. "After they filed for divorce, he started hanging out there a lot, and we started talking more."

The secret affair between Gosselin and Santoro began with a phone call in which he asked her to come over to his Wernersville, Pa., home to "hang out in the hot tub and talk more about everything."

During this night, the couple took turns giving each other back massages, which ultimately led to their first kiss – and Jon delivering a nauseating pickup line: "Whatever you do, don't fall in love with me, because it's going to be impossible for me not to fall in love with you."

Santoro goes on to reveal intimate (and somewhat disturbing) details about their month-long affair, in which they slept with each other nine times.

"I wasn't looking for the pleasure part of it. If you care about someone, it's not about how good they are in bed," she said. "It wasn't terrible, but it wasn't the best I ever had."

She added, "We would lie in bed and talk about the future. He would say how he wanted to make sure my daughter and I would always be okay, and how he would take care of me."

Gosselin, 32, continued to tell Santoro how much he cared for her and assured her she wasn't being used. In exchange, she returned to spend the night at the Gosselin home the entire week.

Although their "genuine" relationship seemed promising, Santoro was the source of the Gosselin's biggest blowup to date.

Upon hearing news of the baby-sitter's sleepovers in August, Kate made a desperate attempt to return home but was refused entrance by Jon. Police were called and Kate eventually spent the night in a local hotel.

"It only really upsets me when the people he's choosing to bring to the house and let, ahem, stay overnight effect our kids," Kate told People.com at the time. "That's not the sort of example that I will ever set for them and that is where it really kills me."

Santoro's mother, Marci, is also speaking out about the philandering father, who reportedly asked her to deny the affair to his girlfriend.

"He told Stephanie that he cared for Hailey, but he didn't see her as the person he wanted to spend his life with," Marci told RadarOnline.com. "He didn't see her as a stepmother figure for the children, but he said that he couldn't end it now because there was too much stuff, like the clothing line, that Hailey was involved in. He had to be careful how he handled everything."

Jon may not have been careful with his and Stephanie's relationship, but he's taking extra precaution to protect his image with new lawyer, Mark J. Heller.

"The content of the story is shocking, especially in light of the fact that a non-disclosure agreement purportedly prepared by the production company had been signed by the nanny before she started working with the Gosselin family," Heller told Usmagazine.com.