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EXCLUSIVE NEW DETAILS: Why Police Were Called To Jon & Kate’s Home

Police were called to the Gosselin house in Wernersville, PA Thursday night after Jon and Kate got into a heated argument over Stephanie Santoro, the nanny who was on duty that day.

Click here to see photos of Jon and the babysitter.

As RadarOnline.com previously reported, on at least one occasion, Jon has spent the night with Santoro, 23, a former cocktail waitress, single mom and aspiring model whose online resume reveals she’s willing to pose nude!

One source close to the situation told RadarOnline.com, “Kate showed up at the house unexpectedly. It’s Jon’s scheduled time to be there with the kids.”

Click here to see how Jon spent the day with the kids.

Jon was inside the home and wouldn’t let Kate in.

Kate reportedly started screaming at Jon at the fence outside their once happy home about his relationship with Santoro – the nanny hired by Jon, and not Kate.

Amid all the screaming, someone called 911. Police arrived, but no arrests were made. Kate left and checked into a local hotel.

Click here to read about Kate’s escape to a nearby hotel after the fight.

As the couple’s marriage has unraveled, so has the civility between them. “Kate couldn’t get access to the house. She was upset,” said the source.

Click here to read about Jon’s upcoming Las Vegas trip

And although Jon may have spent the night with Santoro in the past, he is still romancing 22-year-old Hailey Glassman.

Click here for the latest thing Kate had to say about their marriage

Keep checking RadarOnline.com for all the latest developments in the Jon & Kate saga.

Jon & Kate Plus 8 airs Monday nights at 9/8c on TLC.