@Methapon13 Umm you seriously just noticed FMC has done it? Author has implied several times that FMC has slept with many men who sheltered her before.
Out of all men, only MC who gives her warm like a family that she seek. The other men just used her body as an object and sperm toilet. FMC didn't seek sexual pleasure, she wants the warm of family and that's why she go from one man to another man. In other words, FMC is a very experienced woman on bed.
I'm quite amazed she haven't get pregnant actually... or was she?