JD, it really irks me the way your W tries to control and manipulate you! She comes at you making demands and trying to convince you the kids are on board with her plans, it's just aggravating. You are certainly not obligated to stray from the separation agreement, I would flat-out tell her that she is being disrespectful towards you and if she wants to negotiate visitation with the kids during your time that she needs to approach you in a more respectful manner or you would prefer to leave everything as-is. She's being ridiculous and it's time to put her in her place.