I get it, its definitely gonna piss off some people for that story reveal. Not gonna lie, I was pretty enraged with Taina too, but it sadly also makes sense given her interactions with the MC since leaving the farm with the MC to go back and remove her uncle from power. The only thing that really upsets me is whether that intimate moment they shared at the farm, making out in bed was real, or just her way of seducing the MC to help her out but that she had no real emotional connection or desire to be with him as his lover and woman.
Sadly, I wonder if we are forced to go through with the marriage arrangement with Taina in order to retain the title and status as the Lord of Nord? At the bare minimum, she deserves to be relegated to the harem, even though if Megan joins her there, it will seem like less of a punishment since they could technically get back together while in there. I really wanted to like her, but truthfully the way her character is developed, she never left much emotional or romantic interest for me...and in a sense I guess we know now that her heart was with someone else all along.
I actually do still like Megan and feel sympathy for the hard life she's had to live...an abusive father and husband has more or less caused her to take solace and pleasure from her female lovers, but if she can be redeemed and desire a consensual romantic relationship with the MC, I'd strangely give her another chance before I gave one to Taina.