A mum is "heartily sick" of her sister-in-law's behaviour and wants to put her foot down over her upcoming wedding.
The mum is particularly annoyed because the wedding is abroad, with the bride insisting everyone stay in a large villa together for five nights - and split the cost between them. The mum doesn't want to be "cooped up" with her husband's sister and extended family because "she throws her toys out the pram when she doesn't get what she wants".
After initially declining the invite due to the high costs associated with attending, the mum compromised by agreeing to save up but choose her own accommodation for her, her husband and their children - but her proposed compromise has resulted in her sister-in-law "kicking off". The mum doesn't want to back down and "enable" her husband's sister's behaviour to continue.
