Milking and ruining the gimp

Lady Valeska has her gimp tied to the bench. The gas mask goes into a rebreather bottle, with some piss in for extra intensity. The sub is already a little hard when teased above the rubber, before the cock is brought out, ready to be milked. Plugged into the Venus 2000, there's a rythmic pulsation as the tube starts the masturbation process. Edged closer and closer. A little teasing as it comes off, before returned at a faster pace. It is then geared faster and faster and faster... Then the tube is removed, and it's the point of no return... A huge glob of cum is released... albeit, without pleasure as it's a ruined orgasm.