Sleeper, My W comes up with a plausible excuse everytime she wants me to take the kids. She switches weekends at least once a month and always has an excuse why she can't watch them. I feel like a doormat sometimes but I always do it if it is at all possible. Sometime I do change her terms a little, but I still do it. In the end it means that I get to spend time with the kids.
Arguing with her will not change her, it will only piss her off which will cause her to find new ways to attack you. Beside the last thing you want to fight over is who is going to spend time with the kids.
Lying comes with the territory. Some times it is obvious, sometimes it is suspected. Accept it and carry on. Don't get sucked in to her crap. Again, fighting with her about it will make no difference. She won't stop.
M35 W37 S9 D6 M12 yrs Know 15 yrs Bomb 1/28/07 My Sitch Failure is the opportunity to start again more intelligently - Henry Ford