
I'll just spoil here because I'm too lazy.
So Trashta becomes pregnant and so the idiot emperor wants to divorce MC to legitimize his kid. His aides and ministers think this is a horrible idea and try to convince him otherwise but he's convinced and doesn't listen. It's because when they were kids he accidentally fed the MC infertility cookies so when Trashta became pregnant he was just like "oh such a relief, it's her and not me". Funny thing is is that kid isn't even his. Anyway, his brilliant plan was to divorce MC then marry Trashta for a year or two to legitimize the kid. Meanwhile MC would be pining for him in her house and when the kids position is safe enough he would marry MC again with the excuse that Trashta is a bad empress. So he would have MC as his empress, Trashta as his queen and his kid as his legitimate heir and they would all live happily ever after. Not kidding this is how this dumb excuse for a man thought. But he never shared this to anyone because he didn't want anyone to know that he basically ruined MC by giving her infertility cookies and that he himself might be infertile. So MC overheard him when he was saying that he would divorce her to his aides, which is how she decided to remarry and dump his ass.

It's been a while since I read it and not sure what is happening in chapter 81 exactly, but I think this is before the divorce, right? In that case
Dumb emperor ofc refuses to have her remarry and wants to stop it but is powerless. So he imprisoned MC and her beloved Hubby in MC's family home to stop it but they escape later on. Trashta becomes bitchier and tells the emperor some shit as if MC had been unfaithful. MC and Hubby get to his kingdom where some more drama happens because people are wary of her since she was their neighbouring country's Empress. There's also this other bitch that was hubby's brother's wife? I can't really remember but she didn't want to give away her empress position so there was more drama there. The Dumbass emperor wants to get MC back because "how could she betray me like this? She loves me and that man isn't worthy of her since he's a flirt" (this part had me laughing and fuming over his hypocrisy). But there's no misunderstandings or anything between our beloved couple. It's just how her Hubby tries to show her how much he loves her and her learning to trust again while she tries to win over the people.

Yeah sure. I haven't finished it yet since I don't want to pay for the raws, but so far our mc is doing great. She's pregnant and her hubby is trying to prove his love for her. Dickhead ex is still trying to break them up and Trashta is getting more jealous, but it seems that the dickhead is going to find out about her lies and petty schemes soon enough (when she lied and made stuff up about our MC being unfaithful before the divorce). Anyway, there's a bunch of politics in the other kingdom since it's a big hard for the people and nobles to accept an empress that was the empress of the enemy state, but our mc is just trying her best to work and improve their daily lives, so they come to accept her. Apparently she even has some magic which she uses to save the people from a flood (don't really remember this part). Oh, and the hubby has a sister in law that's in love with him, so she's trying to make them break up, but it doesn't work ofc. And our MC's brother is meanwhile trying to expose Trashta, and he's gathering evidence.

where are you reading the novel? b/c in this website https://wordexcerpt.com/series/remarried-empress/ they're barely on ch131 & the emperor mentions the divorce for the first time. Are you perhaps reading the original ones?
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y was he shocked that she was going to remarry
dipshit, you're remarrying too
did you really think that after divorcing her that she'll just stay pitiful