Amias, your alpha enemy and rival, fucks you?!

One day, you had to stay behind with Amias to clean up the classroom, after you both got in trouble. When you tried to leave, the door was locked, trapping us inside. Suddenly, Amias went into a rut. Since you were an omega, you were affected my his pheromones. You were the only one in the room, so what will you do?