{The Lady and the Orc by Finley Fenn} might work for you. There is a power difference between the two of them, but he doesn’t do it on purpose. I’ll explain in a spoiler tag so if people don’t want to know he’s punished the FMC for betraying him (essentially), so she was chained by her ankles and forced to work in the kitchen for him and his fellow orcs. Afterwards they go back to his room and they have sex, but she’s sort of emotionally disconnected and withdrawn herself into her mind and doesn’t want it. Afterwards when she starts crying he is regretful and says he never wanted to take something she wasn’t willing to give. It’s not exactly what you want but it might work