You continue to furiously jack off as you watch the three servants swell with shit.
'Bigger' you thought. "Burst those fat bellies". Sure enough, each man grew bigger and bigger, until they began to break through the ceiling, their mass pushing the other marines aside.
"Oh fuck yeah, you look so hot Steel!" said Weston, as he crushed the bar underneath him.
"Oh yeah" said Steel, moaning with pleasure as he felt his huge ass knock down a wall.
"Bigger, make us fucking bigger, I wanna burst!" yelled Adam's, his belly pushing through the ceiling. Each man was now a 15 ft tall blobby sphere, there guts making stretching and straining noises.
"Fuck yeah" said Weston "Here we go!"
"It's been an honour growing with you fine sexy gentleman" said Steel. Then, each man burst in a giant flood of shit. You shot your load as you watched the marines get burried in a wave of brown filth.