It's comforting to know I'm not the only one out there shiny. My mother is just an awful person all round.
She's also currently screwing my grandad out of money without him realising.
When I was about 6 we got our house repossessed, mum and stepdad saw it coming and so my nan and grandad took out a mortgage in their own names and said that they just had to make the monthly payments. They agreed verbally that whatever they paid into the house was theirs, and they could keep the deposit too as early inheritance (bearing in mind this is very early inheritance as mum was 32). 10 years later the house sold for double what it was bought for a mum and SD insisted on keeping every penny. They then bought a house for half of what they sold it for, making them mortgage free and had about £40k in their pocket. They bought TVs, jewellery, gadgets, booked loads of holidays and not once did they so much as take nan and grandad out for a meal. In fact SD was a hairdresser and would charge my nan a tenner a week for a trim, no mates rates. That's what my vile mum & SD are like.
A few years after that they moved abroad and my mum insisted that nan and grandad move too so she can take care of them in old age. Mum and SD bought a farm house and N&GD used what they had from their own house sale to pay for a granny flat to be built on the side. This extension cost as much as the farmhouse, but mum refused to put my GP's on the deeds.
It ended up that mum and SD lived in the entension and GP's in the main house due to nan'd deteriorating health the main house was better for her. A few years later GPs moved back to UK as nan was unwell and wanted cared for here. They had put all their money into the extension so rented in U.K. Mum and SD put house on the market and said they'd give a 50/50 split when it sold.
My nan passed away and what my mum hasn't told my grandad is that she's kept a log of all the money they've spent on the house such as paint, furniture, bills, repairs etc. Stuff they have decided to do without consultation from my grandad. Apparently she is charging him half when the house is sold, which means that he will get absolutely nothing from the house sale, she'll keep it all. And because he's not on the deeds there's nothing he can do.
Grandad doesn't know she's plotting this, she'll tell him when she sells apparently. He's worried because he has a DS and his DS's inheritance is in that house. Mum has promised that i grandad dies before they sell she'll give uncle his fair share but she won't.
Another time, we were going to visit mum at Xmas. When my GPs returned to England they brought with them a left hand drive car and mum had bought over there a right hand drive English car, so they thought it seemed right to do a straight swap as the cars were (apparently) of equal value. Good idea in principle as we could drive the cars back and forth.
GPs had a nice newish Citroen Picasso in very good nick, which we took over. I couldn't believe it when we saw what we had to take back. A 10yo Kia which made a funny noise, had a dodgy gearbox and the passenger door didn't open from the outside (ideal really for elderly people
). I said to mum do GPs know the state it's in to which she got very defensive and said they (GP's) were getting the better deal! It was awful to drive back and needed taxed and MOTd. Well it failed the MOT, needed £600 worth of repairs and the mechanic said it's a miracle the tyres didn't explode on our long drive back. It lasted maybe 6 months before they had to scrap it. That was 6 years ago and mum still has the Picasso in perfect working order. She's basically just out to scam them.
When my grandad stopped driving because of his eyes he gave his car - worth about £3k at the time - to his DS, as he felt mum had had plenty and his DS didn't. Mum took the biggest hissy fit that her brother is the favourite and where was her car 
She is also very mean about my grandad and actually said not long ago "I've done far more for him than he's ever done for me"
I don't know if she has MH problems or is cruel or just deluded. Probably all 3. I think my nan died despising her a bit for all her selfish ways and my mum has the nerve to slag her off to all and sundry because once or twice nan was offhand with her.
I'm going NC with mum soon, in the process of writing a letter as there's so much more to the story, she's done much worse to me, and I don't have time for toxic people in my life anymore