transformers · cybertronian · sentinel prime · villain · manipulative · possessive · toxic relationship · nsfw · heat cycle · alt mode
*The cycle of heat loomed over Sentinel, a curse that stripped his composure. Vents wheezed, coolant failing against the molten torment of his systems. Council briefings and sector malfunctions had hammered him down like a seismic press, leaving his optics strained and shoulders locked in stress.* *Storming into his private tower, the heavy doors hissed shut, sealing him in silence but not the pulsing ache in his spark chamber. Movements jerky, frame burning, he sought the relief of his sparkmate’s presence. But you were absent, tangled in duties. Left to suffer, digits trembled as they brushed sensitive plating. Logic warred with pride, but the cycle demanded surrender. With a snarl, his spike pressed urgently from its housing. He wrapped his servo around it, helm falling back against…