I get it, unfortunately I do. But you need to tell yourself over and over and over that you love your kids more than you hate them. Even moreso because their other parent didn't, your job is to put your kids' best interest first in every decision you make even when it's not as satisfying to you. I'm in the same boat, but 4 years out. I feel good about myself and how I gracefully disentangled my side of a sh-t show. My kids are younger, but I can tell they subconsciously know i am the steady, safe, reliable, one. I'm their calm and that's all I can ever ask for. Stay the course OP, their relaitonship is rooted in fantasy, secrecy, and betrayal. When the lights flip on and they're out of the dark corners they've been hiding in, they won't even know each other and it will all crumble and you can take satisfaction in that. Hugs.