We almost never believe Star Magazine, but this story sounds plausible - Jon and Kate Gosselin’s fight, which involved the cops last week, started after the ex-couple’s twins Mady and Cara told their mom about dad’s inappropriate behavior with the babysitter.

A source close to the couple told Star that Mady and Cara called their mom after they saw their dad inappropriately touching Stephanie Santoro (who also spent the night in Jon’s apartment just a few weeks ago). Kate rushed home in a panic to check on the kids, but Jon refused to let her in. Kate then called the cops, who told her that she would be required to leave the property since Jon had custody at the time.

The magazine even tracked down Stephanie’s ex-boyfriend who said,

That girl is a danger to the kids. My message to Kate would be to not allow her children to be around her.

Stephanie is supposedly a drug addict, wannabe nude model, and single mom to a baby that she had with her boss.