Spoiler ahead!
Wahahah them having an affair would have been too funny.
But the truth is much better: he is on "our" side. He's draining all her money and land on Perez's orders. So in the end the Brauns (Perez female attendant) have the most land in the west again and can be the wests representatives in court again instead of Angena's. That's what I read in other novel spoilers.
Wait who’s Sershaw?
The gruffy but still hot guy who first talked to Gallahan about the Harbour (they are neighbours, because he is the heir of Madam Sershaw) and then to the empress about her debts/getting land as safety in recent chapters.
Can someone spoil pls about Sershaw's role? Will he have an affair with the empress?