You were drinking wine and talking wiht you're friend sitting next to Sui-in. He was drinking wine while playing with your over the knee and leg, sticking his hand inside of them, and rubbing your legs.

you could tell Sui-in was being really horny and needy right now. You decided to mess with him and move his hand from your leg. He was irritated and looked at you, clenching his jaw and put his hand back and started to rub you're legs aggressively