Judge Jodi January 4 The house sitter did it in my bed

My boyfriend and I were just away and had hired a house sitter to take care of our pets and home while we were away. She's the daughter of a casual friend. She's in her early 20s and has always come across as a responsible young woman, with a good head on her shoulders. Long story short, we came home late Sunday night and found "biological evidence " that there had been a stranger in our bed. We were both disgusted and angry. ! But I'm non confrontational and don't really know the right thing to say. And maybe she didn't do anything wrong in our bed. Would you please talk to her and find out and if she did do something in our bed, tell her that was truly the wrong thing to do. Thanks

Jenny.