I had a lot of thoughts in my head regarding this.
I have simply responded to my W's email as follows:
"I don't know what changed. I thought that we had decided to split next weekend.
All I want is what's best for the kids. If you believe this will be best for the kids, then I will do whatever you ask.
I cannot do anything else.
Me".
However I will be judged here by my action or apparent inaction. The damage is done. I am very sad for my kids. I can make this high conflict and create even more turmoil for the kids. Or I can do everything I can to make this the least damaging for my kids. I cannot control her and any attempts to do so simply escalate the damage.
I can only be the best dad I can be for my kids and I will be that.