I had a similar experience many years back, the sub was wrapped up good, with only his mouth and fuck hole available, I was the first to unload inside him, I then went under the bondage bed and whipped his cock out while he was getting run a train on above, I sucked on his head for a while I was choking on his pre cum he was like a tap, all of a sudden I could hear him moaning and groaning I carried on with my relentless mouth and sucked out the biggest load iv had had to deal with. The fucking didn’t stop he must of taken 6 or 7 loads that night