A long time

After spitting all the cum into the glass, you look and to your dismay it is barely filled. With a groan you go back to the wall and start again, this time with a much bigger cock. The already hardened meat is 9 inches long and atleast 3 inches thick. You gulp, and start to lick. This one does not taste nearly as good as the last, as it has a heavy musk to it. After a few seconds you start to try to suck and get as much as you can. You suck in your mouth, over and over, and while you can tell it’s having an effect you see that it’s not going over the edge. Buckling down, you attempt to deepthroat it, chocking as you do. It takes a few attempt to handle such a thick meat, but finally you start to get a rhythm without chocking. Soon you feel it tighten, and before you can move back to catch it the cock starts cumming down your throat! You manage to pull back to get some in your mouth, but most is wasted.

Spitting what you could into the cup, you look up and see fifteen minutes has already past, and you need to get moving. You manage to blow three more, this time catching it all, and with just over 30 minutes remaining you fill the cup and the door opens. Tired, with a sore throat and hands bound behind you, you move onto the next room.