
Yeah I mean the spoilers are giving these vibes but does her future husband love her or is some political plot because I feel like it is a little better if him too is not that loyal
Also I with plots where less black and white about relationships she can be with the three of the guys without it being cheating as long and they're aware it's a open relationship
It's just weird to think that in a fantasy historical setting

He’s in love with her. He admits to it early on and he’s the first to fall (or is open about it) out of all three. I agree with other comments: it is NTR in the guise of the mc having no choice but to bed multiple men due to her curse from the main antagonist. The poly in this story is poorly constructed, so it would be best not to take it too seriously.
This isn't even a harem/poly type of story. It's friggen NTR.