My Girlfriend’s Extreme Behavior After Cuckold Revelation Leads to Public [Humiliation]

My girlfriend has gone completely out of control. After I confessed to being a cuckold and enjoying watching her with others, she’s taken it to an extreme. She’s constantly sleeping with other men, sending me explicit photos and videos, and vividly describing every encounter. At parties, she shamelessly pursues any guy she can, performing oral sex without hesitation. She’s told all our friends about my cuckold fetish, mocking me publicly, saying my penis is too small to satisfy her and that her “big ass deserves better.” Last week, she escalated things further by inviting everyone she’d slept with that week to our place. In front of me, she compared their penises to mine, then proceeded to have sex with those whose were larger—all of them were. It’s humiliating, and her relentless behavior is driving me insane. I’m at a loss for what to do; I feel like I’m losing my mind.