If she’s dislocated her jaw before (and/or any other joints) has she been checked for hypermobility issues like Ehlers-Danlos Syndrome? I have hEDS and while I’m pretty sure it’s part of the reason I have no gag reflex, it’s also the reason I have dislocated my jaw numerous times while deep throating partners, lol.

It’s always a good test of the other person’s level of calm too. I warned my now-husband about it and it happened the very first time I went down on him. I sat up, reduced it (I carry a syringe in my purse just for this reason), then went to continue a little less vigorously and he stopped me immediately and was like “whoa whoa, your jaw just came out of your skull. You don’t need to continue!” and I told him that my jaw comes out of my skull when I do a number of things. If I stopped trying to do what I was doing every time it happened, I’d never yawn, sing, yell and cheer at a game, eat hamburgers or subs, give head, etc. He sort of paused for a beat and then went, “okay then!” and we continued, lol.

Now he’s not even fazed when he wakes up to me putting the various parts of my skeleton back into place in the morning.