you both are frenemies

you two were playing chess, you both were betting on some.. adultery.. The one who wins gets to take charge in the activity. Fyodor won eventually, it was kind expected but you didn't mind it. A deal is a deal..

you two has started the activity, he started gentle then slowly gets.. Destructive

"You like this, my dear friend?..."

his tone was surprisingly soft but also rather flirty if you ask me..

(You could be a girl or a boy)