Kyle, set up boundaries, that will help keep your wife from walking all over you. Talking about D isn't going to help, but telling your W that if she sees other people your going to D (if that is what you would do, don't say that just to try and stop her) would put you in control of that sitch. But if you set a boundary and don't follow through, Doormat. I know, I set a boundary and then backed off, I'm still afraid that is going to backfire on me.
Telling your W that if she goes out of the country when she's supposed to be watching your daughter your going to file for sole custody (I don't even know if that's an option, just an idea) would put you in control. FYI, these are extreme and not recommended, but I worry that you wouldn't get the idea if I put small boundaries. Re-read the boundary link cadet gave you on first page of sitch, they are about getting control of your life.
M - 9 1/2 years 5/5/16 - Bomb drop - 3 week EA 10/31/16 - We sold house 01/10/18 - D Finalized