We had a bit of feud between my Mum and her brother and sister. It came about after my grandmother died, leaving no formal will, but a letter found in her desk and dated several years before her demise.
We lived in a large house owned by my grandmother, but apparently paid a regular amount of money each week as a sort of rent - in turn my Grandmother was looked after in her old age and my Dad took on all the DIY and maintenance as well as earning a living on night shift in a local factory.
The letter stated that the house should go to my mother, provided she paid her siblings and equal share of the price of the house when first purchased. Alternatively, the house was to be sold, a smaller dwelling purchased for Mum and her family, and the balance to be split between Mum and her siblings.
My uncle's wife as much as said mum wrote the letter and there was uproar. the upshot was that the house was sold, the money split three ways and we then had to find a new home, while my uncle and Aunt had a nice little earner!
They never spoke for many years....... and my mother died 18 months later. My Dad said the stress contributed to her illness (she'd had MS for 14 years).
Which only serves to say - MAKE A WILL!!!!