[Ren puts a hand to his heart delicately at the insults, in exactly the correct way to convey that he doesn't give a single damn but he's pretending to be offended for his own continued amusement.]

Oh, I'm hurt...but you just being here to get what you want was the problem from the start, wasn't it~? [Ren puts that rather lightly, leaning back in his chair and crossing his legs as he taps his fingers against the table in a sort of fidget, as if he has difficulty staying still for too long.] It's no fun if you don't deserve it, after all, some people just need a good ruffling. That's all it would be if you weren't insisting on making it worse for yourself at every turn.

[Ren punctuates that with a wink and a rather playful pointing gesture towards Sanzo before he curls his fingers back under his chin, as if he needs to prepare for the inevitable further amusement coming.]