i mean... if i had a fear of my love interests constantly being taken away by my older sister, and my new one laughed in my face about it, id be upset too
So this chapter makes it looks like her sister either always “steal” the girls she has something with or that her first crush had a crush on her sister.
Different from what I thought when she was first introduced where I thought she was sexually assaulting/raping her🤣
I mean, with how much she played around with that other girl, why wouldn't MC laugh at her crying? The moment she realizes she's that hurt because she loves her, it would be too late by then. That's karma right there.