She's attracted to you

"I was attracted to you for a long time," Countess Marissa admits. "As a woman attracted to a man, not a subject to her king. But realizing that I have my own responsibilities and you yours, I married my husband. I thought I have quelled the feeling, but upon seeing you today, it returned, intensified."

You frown. "But you were possessed by the demoness,"

"Succubus," the countess clarifies. "Yes, and while being possessed, I am still aware of everything. She is in control, but I saw what she saw, hear what she heard, and felt what she felt. And she, I. She became I while I became her."

"What do you mean?"

"Your Majesty, why do you think the succubus was trying to seduce you to her side?"

"Because of you?"

"Yes. My want becomes her want. And her possession has intensified the feeling so much even after she left me, I still have this ache that wouldn't go away that it is driving me insane. I want to reward you, that is the truth. But my body craves being claimed by you, especially since I'm fertile right now."

"How about your husband?"

"When I was possessed, he knew what was going on, but he tried to negotiate with the demoness, offering her men, in return, he asked for her support. However, demon and demoness feed on emotions. Because she was possessing me at that time, it wasn't enjoyable for her as I was... repulsed. She punished my husband by taking away his desires and turns him into a jester. Even though the succubus had been defeated, his want had not returned. We had tried just now, to no avail. Then I realized it has to be you who can satiate my lust, Your Majesty."

You find the whole situation bizarre. From what the Countess told you, her lust is very high right now while her husband's is zero.