You tried to relax your throat and think about other things. But each pump of the machine shoved the dildo down your throat just far enough to trigger your gag reflex. It probably wouldnt have been so hard if Master hadnt cum in your mouth first.
I better see that load still in there when i get back! He said as he flicked the machine on and slammed the door shut. That was 3 hours ago&
Now the machine was mixing the now stale cum around your mouth. It was like churning butter. Each pump made it difficult to take the cock and keep the load in your mouth without choking on either. Bubbles would form as the froth inside your mouth was agitated. Hopefully Master would be back soon&hopefully&