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I live at home currently, with my mother [54] and my sister. Aswell as my handicapped aunt who stays at our house every month and then moves to my other aunt.
So yeah my mother has money issues, at home. My sister was gifted two horses at a young age because she is obsessed with it. Even though we don't have enough space for them to hold or the money. It's been around 10 years we live in this crap.
My sister first tried to force her fandom onto me when I was young. She manipulated my mother into forcing me to learn to horse ride. Made me buy equipment and stuff. She even went out to buy me a horse which I didn't even ask for and blames me now that I don't look after it. I couldn't give it away since it is on my mother's name, I'm not really the rightful owner.
Now so far, I've managed to cope with her behavior. But lately my mother inherited some money and she is trying to manipulate my mother into giving it to her. Not even share it with me.
She manipulates everyone in my surroundings to think I'm the bad guy first so no one thinks that she is the real slimy scumbag azing after my mother's cash. She lies all the time lately. She even stated she overheard me begging to my mom to buy me a brand new car even though I haven't said such thing. i told my mother the first thing she should do with her money is go on a vacation on her own, without the issues and troubles at home.
I don't give a crap what she does with her money. For all I care she spends it all. I only wish if she would repay my money I borrowed her 3 years ago so I could have an eye surgery to repair my damaged eyes.
My sister at the same time is looking for houses with lots of stables for my mom to buy, or she's looking for a big car and van to move her horses around, or she is looking to build nice stables on our lot.
She's angry that I talk my mother out of it. Often twisting the story when confronted into trying to blame me for something. It's tiresome and frustrating. Everytime she gets confronted she changes subject to that one time I forgot to close the door and that she got mad for example. You can't really argument with her because she starts yelling, crying, telling she's going to kill herself, etc...
Lately though I've began to worry because we had a brochure of a company that deals in building stables and other horse furnishing in the mail. I asked my sister if she had anything to do with this but she just acted like her nose bled. Now my mother showed me a letter that came with it that she tried to hide stating the order was done in my mother's name even though she didn't ask for it at all...
I don't know what the gently caress to do with this anymore. I'm beyond pissed off at the moment. My mother is a very naive person that is easily manipulated because of her traumatic background and here my sister is just taking advantage of it for the loving scumbag she is. I wasn't supposed to tell my dad about this inheritage, at first I didn't know why but now it's clear that my sister is trying to not hurt her image as daddy's little princess (I don't really come on good terms with my father like my sister because of it)
tl;dr: Sister is absolutely obsessed with horses, tries to manipulate my mother into giving her inheritance to her for her horses