Ok I realise I am probably being unreasonable here!
Basically my Grandma has recently changed her will to split half of everything between my mum and her brother. She had previously written my mum out of it because she didn't like her boyfriend, but when they split up after 14 years she was 'reinstated'.
My Mum went with her to change it and asked my Grandma to leave her half to my brother and I as my Mum is very well off. My Brother's family and my own are really struggling financially since the recession and still haven't managed to get on the housing ladder.