I hope someone here can help me, I’ve been searching for this story for forever! It was on the everyoneweb site and I’m pretty sure it was called “The Mad Orthodontist”. It started with a bait and switch orthodontist - consultation with a beautiful and modern ortho and then treatment with a surprise twin who uses extreme appliances. Main character ends up with wired double headgear, someone has a modified double facemask, there are multiple erotic scenes. That’s all I remember right now, but I can add more details if they come to me.
Thanks in advance!