Ok so this is really bad but I do need help with this. I do apologise to anyone who finds my problem silly.
I've posted about this before.
Basically my DP(arents) and DH have had a fallout and are NC. Not going to work out anytime soon.
Up until now we've not had issues with Christmas as my family are from a different country where we have the main celebration on the 24th which is Christmas Eve. So we would spend 24th with my DPs and 25th with DHs family as that's when the respective parties celebrate.
This year my DM started a new job and will most likely be required to work on the 24th (it rotates every year and since she's a new starter she will most likely work it this year). She has stated that she will be doing the Christmas celebrations on the 25th. For obvious reasons this won't work for me. She's left it hanging in the air and I know she's waiting for me to address it (basically to say I won't make it as we are at PILs) and make me out to be unreasonable as "it's only this year" or "I'm working all other days surely you could make an exception" or "insert other quote about being pushed aside/made to feel worthless/guilt trip" .
I know I'm not being u in this (I hope so anyway), it would be unfair to expect my PILs and BiL with his wife and kids to change the day of THEIR ACTUAL CHRISTMAS because my DM is working on the day of hers. I know my PILs will generally be off over the Christmas period but it's Christmas Day! My family don't celebrate Christmas Day they celebrate Christmas Eve. Not to even mention I'm not taking my toddler DC and new baby away from their DDad on Christmas Day.
So long story short need ideas of the best way to phrase this to sound reasonable to an unreasonable person...?
I need to sound so reasonable she won't have a point to argue (even though she probably will as its my DM). I don't fancy any drama/issues or long discussions or debates but I feel no matter what I will be made out to be the bad one...
Please throw your best stock phrases at me???
IOY 

