Man does the B&S stink. Putting your clothes back on is the absolute best time to negotiate with a MMS or provider. You cannot do shit when you are naked, but damned does the negotiate drop into your lap when you are getting ready to go out the door. MMS house fee is negotiable at the front, the provider is negotiable at the front and damned if they start the negotiations after the flip, that is even better. Once they have had you in the room massaging you for 15 to 30 minutes, they sure as hell do not want to see you walk out of the room with little to no tip. After the deed is over, tip according to standard rates. If she was good, definitely giver her a bonus.