Squash Challenge! How Long Can He Last?

In a quest for comfort and pleasure I am going to put my slaves face to the test in this unrelenting face sitting challenge! I had to ensure I was going to get the very best results out of him, so I tied him tightly to the bed, securing him in place, and ensuring his beta face couldn't squirm it's way out from underneath my ass! With a timer in my hand, I plant my big juicy butt down on his head and squash him. Engulfing his face was easy and I could feel him trying to suck in air and survive. With timer intervals increasing after every cruel squishing, it was a case of seeing how long he could suffer for. How well do you think he did?