So now we're going back and forth by text as she is now "not sure" about letting me have D Sat am for vacation.
She said "I'm giving up my weekend with D completely. For what" I said" It's a day and a half. She's not a negotiating tool. You'll have her back for the Sunday eve and Monday of the long weekend. I don't see the problem'
btw, it needs to be said that this was AN EXCELLENT RESPONSE, esp. the bolded part. Good for you!!!
You should have ended it with a leading, declarative, assumptive statement, tho, such as "Let's just stick to the plan of you drop her off by 6" (or whatever) " and get thru this without killing each other."