“I paid my girlfriend to clean my house because she wanted the job and i caught her complaining about me.”

I recently moved and was getting ready to get my old house shown by a realtor. My girlfriend needed money so she offered to clean my house and I paid her a good amount of money to do it (way more that a professional would have charged). I have a security system set up at the house for good reasons (not the best neighborhood), and I got a notification that the outdoor backyard camera had been activated. When I checked the camera, my girlfriend had several friends over my house in the backyard and was saying some pretty awful things about me to them. I was so sad because I have always been so good to her - buying her things, making sure her bills were paid and she had groceries, taking her homemade soup over her house when she was sick. She knew about the cameras, which was really confusing that she would do that. Maybe she had a bad day, but it was very hurtful. She doesn't understand what she did was not very nice and defended herself.