Well, the two of you can argue back and forth about who got what e-mail and who didnt and continue to cause conflict and more ill feelings OR you can both accept that was some sort of e-mail snafu and find a solution.

Going back and forth about the e-mail is the past and it simply rehashes the communication issues you both have. So, do you want to keep rehashing and arguing over an e-mail or do you want to find a workable solution to the issue at hand?

What your WAS seems to not get is now that you ARE on your own it is perfectly within your right to decide things on your own w/o her consent or approval (ex: vacation time). But it doesnt seem she is in a place to accept her role in this miscommunication and pointing it out to her will only cause further demise.

So, what can you do to defuse this situation and find a workable solution so you both can have a vacation with the kids? And, what can you suggest for the future so things like this dont happen again?

This will need some editing but I would respond with something like this:

Dear W,
Thanks for your quick response. Clearly there was some issue with our e-mails as I dont recall receiving any message from you regarding the vacations and schedules. While that is unfortunate my desire is to find a workable solution to this issue with what we have in front of us at this time.

I understand both of our time is valuable and time off work is precious. I have offered the suggestion of me taking the girls as planned in June and you taking them in July. However I am open to any additional suggestions or solutions you may have. I know we are both fully committed to co-parenting our girls in the best possible fashion so I am confident a compromise can be reached that is favorable to all of us.

Also, I would like to suggest the creation of a family calendar so both of us are able to view things such as vacation times, school events, appts and other child related activities. It would be very simple for me to set up an online family calendar that we both have access to and I would be happy to do that. Of course, I would appreciate your input on this idea.

Thanks!
Antlers