RTL, Stop!!!! you are becoming an enabeler, or however you spell it. This is all crazy, sh&t happens, it is nobody's fault, you really need to stop interacting with W completely. Only texts with dates and times for pick up and drop off, NOTHING ELSE. If you care about your D's life, stop this insanity. Do not let W suck you in anymore. Try to go on with your life and break the hold she has on you, it is poisonous. You truly tried your best, there is nothing there but dysfunction. There is a 5 year old child at stake, you need to stop joining her in her psychosis or you will be as culpable as she.
