It's chapter 18 and you guys still don't understand that FMC wasn't actually gonna report MC if he refused ... She would have saved him no matter his response. She just did that because she didn't know how to convince him. Look at chap 1 again, she was always super confident and overconfident , and the only time she was actually confused and didn't know what to do, was when he refused her proposition. The reason why she even wanted him to be her "closet" was because she knew who he was and wanted to be close to him.