My wife never was into gloryholes, but loved to suck cock. The only thing she did similar to this was she sucked off two different guy in the back of an adult theater one night.
She swallowed for both men. One of them had a small cock ( about 4 inches) but he pumped a HUGE 10-12 spurt load in her mouth!
We both laughed about it on the way home…..she was not expecting that much cum from that small cock. She was pleasantly surprised and kept saying how he just kept spurting and spurting. She said she had to swallow about 3 times to get it all down and to keep up with the flow of cum.
She also admitted afterwards that he tasted amazing, and that he made her evening!