I don't think the writing is that bad. I mean, editing is definitely required for spelling/grammar/style, but the substance of it is overall fine and accomplishes what it should. Each of the characters tends to act out in the way that makes sense for their character, and there's something somewhat believable about the way events play out. Even the way MC and Amelie are really pushing it and in danger of being too obvious and getting caught, makes sense given that they're clearly starting to lose self-control of themselves. It's not bad storytelling, for the kind of story it's trying to tell and the needs of the kink genre it is aiming to satisfy.