"Alaric woke Cassian continually through the night, demanding a knot each time. He could tell the prince was growing fatigued but Alaric couldn’t find it in himself to care, his heat driving him to need his alpha’s cock inside him with a fanatic desire, needing to be filled again and again in a way he had never felt in the heats he'd spent alone with the polished wooden toys unmated omegas had to use."
The Prince's Mate is an MM Omegaverse erotic short with explicit content including knotting, heats and mpreg.