Khushi is upset with the way Payal sees their relationship. Khushi doesn't understand her perspective and believes its messy with them because they are both sisters and friends. The role is mixed and Payal is unable to prioritize what's important to them. Instead she picks a role "sister" and decides that's how she is going to. They will be sisters, who are there when they are needed or most necessary instead of, being friendly. It's a complex line that Payal has drawn and Khushi isn't liking it. She is hurt, for very good reason and she also knows that Payal doesn't understand how fucked up her world view is.