Dearest MiL,
Fuckity fuck fuck fuck. How dare you treat us so horridly when we’re doing you a favour by taking you to Belgium to buy your ghastly stinky fags. How petty of you to stomp off like a hormonal whiney teenager when we remind you (nicely!) that smoking in the car is a no-no. How ridiculous it is to make nasty sarcastic comments over something trivial said by Blokey over, and about, breakfast.
For goodness sake woman! Sometimes you’re like a vile poisonous wart in an uncomfortable place.
I’m sorry [I'm not] but I will not have you hurting my husband in the way that you do. You are a manipulative, wrinkled old bag, who never thinks of anyone but herself. Why on earth he chooses to put up with your bitterness I really don’t know, but if you were my mother [I'm very glad that you're not] I would never let you get away with being so evil.
His illness is purely a personal vendetta against you, isn’t it? Be honest now. He chooses to be ill as a means of making life awkward for you. And oh my gosh, doesn’t his wife milk it! Tsk. But MiL, he *IS* ill. He is exhausted, stressed, sad, emotional, wary and (quite frankly) pissed off. His weekends are more valuable to him than you will ever realise. He needs those days to re-energise in time for the next relentlessly unforgiving week of full-time work and dialysis sessions and random hospital appointments that simply confuse and upset him. Driving the three of you to Heathrow [when did he even offer; why do you assume so much?] will take approximately seven hours in total (from FlatHickTown to MiLTown, then on to Heathrow, and then back again). That’s a whole day. A whole day of stress and tiredness, when he needs to be relaxing.
How many thousands do you have in the bank? Don’t be such a fucking tightwad … taking out a bit of cash to spend on a taxi will not bankrupt you. If it makes you feel better, take it out of his bloody inheritance.
This is all so new for him [and for me] and yet where are your words of support and your cuddles of love? Hmmm? Your husband would be appalled at your behaviour. Seriously, he would. If you carry on being so bitter and so venomous you will start to push Blokey away. None of us want that [although yesterday when he said, "I wish she was bloody well staying in Australia," I think he actually meant it], but it will happen if you continue to be like this.
Oh, and one final point. You can be as horrid to me as you want. You can ignore me, refuse to even look at me and [quite probably] bitch about me to BiL and GiL for absolutely nothing [seriously, just before bed she was lovely, in the morning it was as though I didn't exist!] but one day I will be the mother of your much-wanted grandchildren, and when I am I will hold ALL the cards. Yes indeedy. I can play your game. And, scarily, I can play it better than you.
I wish you an enjoyable holiday in Australia, and hope it is an experience filled with spiders, snakes and Swine Flu.
Love,

(One day I will write a happy post, honest! In the meantime, thanks for letting me grumble!)