I think it goes beyond slut. A slut is someone who bangs a dude she doesn’t know because the only way she can feel validated is with a cock inside her. That’s fine. A little sad, maybe, but to each their own. I think we’re all a bit slutty sometimes.
This is a female character literally going “I’m going to get raped by a monster, that’s pretty hot”. That’s just fucked up. Not to mention the lead-up. As fucked up as modern Red Sonja comics can be when they insist on keeping the 1930’s plotline of “I’ll fuck any dude who can kick my ass”, at least she gives consent beforehand. This is some hentai “women secretly love being raped” shit right here.