I am not good with synopsis, and it has been so long since I watched it but I'll try for you
Kate's dad had taken some money from Sake (from his company) to pay another debt, so when Sake found out he was pissed. Since her dad didn't have enough money to pay back he was willing to hand Kate to Sake as a payment. But in the back of his mind, he kind of knew Sake could take care of his daughter, not realizing Sake has issue with trust because by then he had a wife that way lying to him all along about having a baby. So, his trust with woman was pretty thin and only got thinner when he met Kate lol.
The lead up to the R scene was good. Sake was so pissed that Kate went and got her pictures taken, she did it because she needed money and could not go to him for it. The pictures to Sake was suggestive but he was jealous of her anyway, so anything would have been suggestive to him (pepper was hot when he was mad). Also, it didn't help his mood when a man he doesn't like comes up to him and said something about Kate...about wanting her and things a husband doesn't want to hear from another man about his wife. When Sake got home he was worked up. He saw his mom and said something about her wanting a grandkid and he was going to give her one that night. And Sake did not fail in his mission cause she did end up being pregnant.
Anyone else remember more please chime in.
But you'll like it. It has the Pra'ek out for revenge, a clueless N'ek at first, a charming second couple and I think this remake might have more to the story. They seemed to make Esther stronger than Ann's version. And you know, when a N'ek is ready to fight back there's going to be a lot of force kissing.