It was getting harder and harder to force the swell of the knot past the rim of Tarn's valve- so Sixshot stops trying to, favoring shorter strokes, moaning softly. Raking his fingers up wet purple and grey thighs, he tips his head and licks Tarn's throat, tasting cleanser and the warmth of energon.

The Sixer shoves the hand around Tarn's spike lower, palm grinding down against the charged anterior node, feeling an electric pop against his plating. His lips find his partner's again in a hungry, hard kiss and he pushes his hips up, engorged knot stretching the other Decepticon to his very limits.