Catching a Cheating Partner Heartbreak & Forgiveness

Description: On December 15, 2021, I caught my girlfriend cheating on me with another man in a sex video. It was recorded in the first person perspective using a VR camera. At first I thought it might be a prank, but after watching the video several times, I'm certain she really did it. She claimed to have been raped by him during the shooting. But in reality, she was enthusiastically enjoying herself, even giving him a blow job. It was truly appalling. Since then, I haven't slept well at night. How could my girlfriend betray me like this?