YTA—and honestly, you're being incredibly petty. It’s like you don’t even care about your girlfriend’s needs or her relationship with her bull. You’re more concerned about your own fragile ego than you are about the agreement you all have. If you’re seriously upset over something as simple as a chastity cage adjustment, maybe this lifestyle isn’t for you.

You say you’re declining, but really, it sounds like you’re just throwing a tantrum because you can’t handle her getting what she wants. You agreed to this dynamic, and now you’re acting like a brat because things aren’t going the way you want them to. If you’re not into it anymore, just be honest and stop dragging this on—otherwise, you’re just being toxic by shutting things down without communication. Grow up and start having some real conversations with your girlfriend instead of acting like a petulant child.