Sister problems!

I’m not sure if this is the right group, but my sister and I are 15 months apart. I’m 20, she’s 19.

We used to live together in a house we rented. My boyfriend & I and her and her boyfriend.

We had 4 cats altogether while living in the house. 2 are mine & 2 are hers.

I had been paying for the cat litter & cat food for all 4 of the cats. (Idk how I ended up paying for everything but I did)

I asked her if she could help out and start paying for half of it or I buy the litter & she buys the food; vice versa.

She told me she doesn’t have the money to help with anything and not to ask again. (I asked her a couple weeks prior to her buying a brand new car.) Her boyfriend just coaxed her into buying a brand new 2019 Nissan. She’s paying over $600 a month for this car. I work only a part time job and going to school. So we’re both pretty short on cash, but I could really use the help.

She flipped out on me and started cussing me out when I asked for some money for cat food. She told me to leave her the f alone and to mind my own business!

There’s way more to this story. Her boyfriend is a pig & I was always cleaning up after his messes and my sister didn’t care if the house was a mess!

When she said she wouldn’t help pay for anything and started cussing at me I told her I wasn’t going to get her cats anything. (Harsh I know..) But I was fed up!

She said that I lost her as a sister and blocked me on everything. Then her & her bf packed their stuff up & left to stay at someone’s house... And she left her cats! It took her 2 weeks to get her animals. I still cared for them because I’m not a monster. But what hurts the most is I was just asking for help and she blew up and cut me off for over something SO PETTY! “You lost me as a sister” WOW ok? I would never say something like that to her!

We are going on a family vacation at the end of July and I was trying to text her to make up and put this behind us but she has me blocked on everything. Now it’s just my boyfriend & I living in the house & paying rent. He’s also helping me buy cat food and litter for my 2 cats. Reason why I never asked him to help before because they’re my cats and I didn’t feel comfortable asking him but he’s fine with it.

But I’m just upset bc how my sister can just be so heartless by cutting our friendship off because of cat food and cat litter?

I want to have fun on this vacation and I feel like she’s going to make it miserable.