Me and my three sisters arranged a birthday meal for our dear mum. One of the sisters has 6 children ranging from the age of 12-19 years old. The restaurant was chosen by sister with the 6 children. Me and my other sister also have children however they are young and didn’t attend the meal. Sister with the 6 children and her husband ordered huge amounts of food and drink. When it came to splitting the bill the sister with the 6 children pays for the bill and then sends invoices to me and my other sister requesting for it to be a 3 way split between me, my sister and the her. The bill was £720 as they had chose quite a expensive restaurant. We are all working class families none of us have so much money. I told her I wouldn’t be paying a 3 way split that i will be paying for 1/3 of mums bill so that would be us 3 sisters paying for mums and then my 1 share of the bill. She was furious saying it’s mums birthday so we should pay. I said I am paying for my share and mums birthday share and that my other sister will also be paying the same as me as it isn’t our problem to be paying for her husband or children. They also took the leftover food with them which was a lot of food as they had ordered a vast amount. My partner has recently been made redundant from his job therefore my finances aren’t so stable at the minute and be family knows. Am I wrong to find this sister selfish.