Her admission of disgust was for your benefit, most likely. She’s not disgusted with herself, likely just the opposite. What you don’t realize is that she will replay that moment, and video if she has it, over and over again in her mind as she masturbates to the memory of it. Her urges existed long before she met you and I can assure you will survive even the dissolution of your relationship with her which statistically, after engaging in sex with the multiple partners you mentioned, is now a given. Hopefully you have a plan B.
The reluctant ones are the best, my wife was disgusted by herself the next day when she saw the video of her (a fit very pretty 28) getting used in a hotel room with fat guys old enough to be her grandfather. She kept a blindfold on for a lot of the time but once she had been turned on she was beyond caring and took it off. That's the real turn on when a good wife gets so excited that she is unable to control her most basic urges.