<human>: Me and my sister have always had a rocky relationship, for as long as I can remember. She is the kind of person who bottles up her feelings and explodes the minute I do anything that doesn't please her. She has serious communication issues, and does the same thing to every member of my family and it's getting unbearable.

When she moved out, things got a little better, only because I didn't have to deal with her in person every day. But there's still the constant phone calls and texts I have to deal with. 

A predominant issue is if I can't reply to her phone calls right away (I'm at school, work, with friends, doing homework, or just relaxing) she goes ballistic. She will text me and say "Thanks for calling back" or "Hello? What the fuck?" and it gets overwhelming because the harassment doesn't stop there. She will text my mom calling me a "selfish bitch" saying I "don't care about anyone but myself" all because I didn't call her back within 24 hours.

We are both adults and it is my understanding that I'm not obligated to return a phone call until I feel like I want to. It's not like I completely ignore her all the time, I text her frequently, we chat on the phone sometimes, but she likes to talk for hours and I'm not a fan of phone calls. I would rather just go see her, she only lives thirty minutes away and she's over at my parents house at least once a week. 

I'm at a loss, I have tried talking to her about this many times but she refuses to see my point of view. I mean, no matter how nicely I phrase it she stays mad. I've talked to my mom about it and she will try explaining to my sister that I'm young and have work and school and friends but my sister just ends up getting mad at her for defending me. 

I'm just getting to the point where I don't even want to try to fix this relationship with her because she's been acting this way since we were kids and I don't see her changing at all. She acts this way to every person in her life, including her boyfriend.

Give me a shortened version of the text
<bot>: My sister gets mad at me and talks horribly about me to my mom if I don't return her phone calls right away.