It sounds like she was in the wrong.
그녀가 잘못 한 것 같애

John : I haven't seen Jessie lately. Have you， May?
May : Actually， when I saw her last time， we had a small fight over the research paper.
John : Oh， really? What happened?
May : Well， to begin with， I have put so much effort and time into it. Originally we were supposed to work together but she never offered me any help doing research. Whenever I asked her to come to the library she didn't show up.
John : Yeah， I understand what you mean. She always seems so busy.
May: And when the time was due for the paper， she had the gall to expect me to share the it with her. No way!
John : It sounds like she was in the wrong.
May: Oh， well.

* to begin with: 말하자면
* be supposed to: ~하기로 하다
Ex) I was supposed to manage new project
* doing research: 리서치를 하다
* show up: 나타나다
* gall: 뻔뻔스러운 사람， 철면피