Not me but damn...

Recent ex, 3 weeks and counting, had an affair with her ex back in the past. What i saw as reasonably, i was upset to say the least and bcuz of my anger she claimed, she was going to borrow a car and go to her parents house in Atlanta for a few days. So far, so..... Ok, i suppose. I had a feeling that she didn't borrow a car, so i video called her. She declined and called me right back on a regular voice call. Why she didn't answer the video? She was driving and can't watch the screen. I told her wasn't about her seeing me. She acted as if she didn't understand. So, i said fuck it. Told her too just turn around and come back home since she had said she was after the Atlanta visit. Didn't want to miss her chance to see family while she had use of a car. Sounded pretty reasonable. Her friend "Kim" lent her the car. Never heard of Kim. So i still had my suspicions. Asked about it. She sends pic of her sister, two thumbs down for no one else here. Her mom calls, I'm just being stupid, she is alone. Dad in the background, my daughter wouldn't do that. All lies. Was driving when i video called. Just out of frame on pic. Stayed in guest room at moms with her, same bed and all. She claims that's what family does, covers up your affairs. Not my family. So they realize that it only serves to show that they will lie to each other about the same thing. And everyone lie for them as well. Is it just what family does? Shared psychosis? Mental illness? Help please.