Dsds mum is volatile. DH isn't innocent. I think they are both quick to, and happy to, believe the others shortcomings so dsd is very able to throw a grenade then stand back and watch while the attention is taken from her and her behaviour and they fight. Weirdly she will then say she hates when they fight and put her in the middle 
So the latest one is that mum puts money in to her school lunch account for dsd to cover "her" days and expects DH to cover the cost of lunch on "his" days. Fine.
He gives dsd 150 pocket money a month and tells her that if she won't accept the packed lunch that we offer her, she has to use her pocket money to pay for something else.
But she doesn't.. She uses the money in the lunch account that mum has given meaning it is swallowed up on dad days.
Mum is fuming with DH. Dsd has told her our lunches are horrible and we have nothing that she likes. We've asked her so many times to provide a list of acceptable lunchbox foods but she tells us she wont take a packed lunch.
Mum used to do packed lunch but now pays for dinners because dsd nagged her to.
So, what can we do to stop dsd doing this? And how can we convince her mum that DH is not being feckless or tight and most importantly stop the angry calls and texts 
