Guilty Pleasure

My wife was r**ed a year ago. One evening after work she was supposed to meet her best friend at a bar and be home around 9pm. Well 9pm came and went. I called her cell, no answer. I finally called her friend and was told she had car trouble and had to cancel. She didn't know where my wife could be. We both have I-phones with the tracking app. I was able to locate her phone near the bar. I drove to the address. I was an abandoned house. The front door was locked so I walked around back. I was shocked to find my wife on the back porch. She was laying on an old, dirty couch. She was naked and it was obvious she had been r**ed. She was conscious but completely out of it. Her clothes were gone but her purse was laying beside her. I got her to the car and took her home. She wanted to clean up, especially the cum running out of her, but would not let her. She put on clothes and I took her to the hospital. She was treated, given a Plan-B and interviewed by police. Even though her clothes were gone, nothing was taken from her purse. Phone, money, credit cards all were there.
Fast forward a few days. I walked in the house and she was sitting at the kitchen table crying hysterically. When I approached her she handed me her phone. A video was playing, a porn video. I was confused until I realized it was her. She was bent over the arm of the couch being fucked by a man as someone took video with her phone. There were several voices. I played the video from the beginning. It started with her nude bent over the arm of the couch as the men slapped her ass and played with her pussy and asshole. Then a man stepped up and began fucking her. It never showed anything above the waist on the men. They laughed and talked while they took turns on her. We determined that there were four men, three white and one black. At one point a man complained she was getting loose and sloppy so he bragged he was now fucking her asshole. The video went on for 90 minutes.
I took the phone to the police but I did something before I turned it over. I forwarded a copy of the video to my phone. My wife doesn't know and I watch the video and masturbate often. She would kill me if she knew.