Police were called to the Gosselin house Thursday night after Jon and Kate got into a heated argument, RadarOnline.com has learned exclusively.
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."
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.
It's not clear who called the police. But it is clear that Jon didn't want Kate there and they argued.
Police arrived but no arrests were made. Kate left and checked into a local hotel.