It doesn't take long to find out

Thrust, thrust, thrust, grunt, thrust, pull... a moment of air, and then it's gone. Thrust.

It felt incredible. Never had the buildup to an orgasm meant so much to either of them. They needed it. They needed it like they needed air.

Already worked up and with his cock stretched to new proportions, even the minimal movement that was possible was enough. Glenn humped furiously and felt his orgasm rise with agonizing slowness until he spasmed, crushing as much of his cock into Lara's throat as he could and felt his over filled cock throb down her gullet, farther than it had ever gone before, and he screamed as the most powerful orgasm he'd ever known blasted through him.

Lara, on the other hand, felt her whole world shrink down to the sensation of his cock in her throat. It was bigger than anything, man or toy, she had ever had and certainly deeper than anything had ever gone into her throat without being eaten. She bit against the gag but she could not bite through steel. Luckily for her, Glenn wasn't totally inconsiderate and gave her a few moments every so often to gasp in just a bit of air, but only just. As the lights sparkled in front of her eyes, she felt him shove his cock fully into her throat and the voices in her head disappeared as her sex squeezed at nothing and she passed out