So my DM was left an inheritance by an aunt of £150,000. My parents are both 65+ and have always lived in rented accommodation. They wanted to purchase a flat. The did not have enough to buy a 2 bed flat in our area even with their savings added. They could have afforded a one bed flat, but I was told "but where would your brother live?
My DB is 45, still lives at home. He has no SN or medical issues (apart from being a lazy git). He never lifts a finger to help around the house. When my father was ill, he didn't help in any way or form. All his previous jobs have been as a result of myself or DM getting him interviews at places we already worked. He was made redundant a few years ago and couldn't be bothered to look for work, therefore he didn't sign on and lived off his savings for 2 years. He eventually got a job after my DM found him one where she works.
As my parents could not get a mortgage they signed all the money over to DB. He took out the mortgage and a loan for the £70,000 remaining on the house. He thinks he'll have paid it off in 5 years.
My Great aunts will stated all the inheritance was to go to DM. However if she outlived her it was to be split equally between me & my brother. I can't help but think if she knew DM was going to do this she would have named me separately for a small sum. I have 2 children under 10 she adored and she often talked of helping us out when she'd gone. 
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I am glad DM is still around to receive it. I know it is her money to do as she wishes. But I‘m hurt that she didn't think it necessary to give any future provision for me. We still have a mortgage we'll be paying off for the next 20 years. None of the plans were discussed with me, I was just told that's what they were doing. When I asked if they were planning to gift anything to me or the children so we could put it towards a holiday etc, I was told there was none spare. Yet my father bought a brand new car when there was nothing wrong with the old one. Oh and finally when I queried the fact DB would profit greatly whilst I wouldn't I was told "well you've had free childcare as I've looked after your kids when you've gone to work, Your brother's got no kids (yet) so yours will get the flat eventually".
So hit me MN‘s, AIBU to be bitter that my DB will have a flat worth £270,000+ and I won't receive a single penny.