Arranged marriage and they have sex on their wedding night

Yeah, they go through with it for the sake of custom or bc they actually find each other attractive and the tension in the book is more of the romantic kind and less of the sexual kind. I want a huge emphasis on "when will they fall in love/admit their feelings", as opposed to "when will they do the horizontal tango". Sex is less of a mystery, even if some sexual tension persists. Kudos if they did it once due to the custom and loved it, but struggle to proposition again or if they do it again, but the MMC is unsure if it's as emotional to the FMC as it is to him.