[His thigh quivers under that first touch of metal, and Pietro fidgets in annoyance, wanting simply to prop himself up on his elbows and get a better look at what Wash is doing, but he can't. He growls quietly and impatiently squeezes around Wash's tongue instead as the knife drags over his thigh, sharp pain flaring out and bringing a pulse of heat to his cock at the same time Wash delves deeper with his tongue. Pietro feels every movement and shift of it, every slide and stroke, scrape and curl, where it presses against sensitive muscles and nerves raw and tender from his cock. Wash has only just started again, but Pietro is well on his way towards overstimulation, having not had enough of a break in between. He can't get as much control to push and move the way he wants to with the pliant mattress under his back and not a hard wall, has less space to move in general with the way his wrists are tied and Wash positioning himself between his legs and keeping the knife at his sensitive inner thigh. Still, he digs his heel hard into Wash's back, grips the bars at the headboard for leverage, sending small vibrations through the frame with his tightly curled shaking fingers, and tries to drive himself bodily further down onto Wash tongue.]
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