Well hey, you earn brownie points with your boss and you even get 'perks' for sticking around in the form of his hot wife.
His Senpai is also quite the...uh, supportive guy. Bringing the rookie along to experience his first night of escorting the drunken boss home and indulging in his wife, even letting him go first and congratulating him on a successful first time.
Great ending though. Yeah, real deep...Inside of her, that is.
The boss's wife is about as promiscuous as she can be, but she's so kindly, cheerful, and good-natured that you can't help loving her. She's like a big, loving Earth God- dess, with no sense of human morality.