Author didn't drop the ball for the chairwoman. Damn, that was a passionate steamy sex scene. Glad they didn't make the chairwoman abusive or totally submissive. She just want someone as an equal in bed and Miyako delivered.
I always love it how the author erotically draws characters kissing. From slow tender pecks on the lips to the swirling of the tongues in a makeout session, it's hot to see that level of intimacy and their art intensity it. I see some characters in other works that are O.K with having sex but stop short of kissing because they don't love their partner like that. It's a good thing Miyako loves kissing, so we see it often!
Speaking of love, it's not the first time Miyako thought about it during sex. It's like she treats every sex partner as her girlfriend during sex.