Stomach Ache Gas Mask Session

My stomach has been aching all day and I can feel the pressure building... so I figured it was the perfect excuse to bring out my gas mask again. It's been way too long since I used it on my slave, and he's about to find out exactly what he's been missing. I strap him in tight, connect the hose, and let my nasty, rumbling farts flow straight into his mask. There's nowhere for the smell to go, it just stays trapped in there with him, thicker and fouler with every single one I push out. Watch the mask fog up with each disgusting blast while he struggles to breathe through my stink. My tummy feels so much better, and he's going to be smelling me for hours. Good slaves take it all.