Uncontrollable expulsion

You can't believe this is happening.

Who would design a toy like this?! Men, that's who. You're sure that a man who never intended to us this cursed thing is the one that decided to essentially make it a lube volcano inside your ass.

The ruse, is over, you realize. The old man knows that something is wrong. He's not likely to leave without finding out what. And the pressure is already too much to bear. The GutGrimer needs to come out, and it needs to come out now.

You bend forward, causing the base of the GutGrimer to no longer be pressed against the bench but instead be pointed behind you. Almost immediately, it bursts out of your butt, making you groan loudly. It is instantly followed by what feels like a gallon of a thick slightly creamy liquid surging out of you like a geyser.

Despite the GutGrimer's cleaning fluid & lubricant combo coming out of your butthole, it doesn't smell like butt. It smells like bubble baths and flowery gardens. But the sound it makes as it spurts out of your rear end definitely sounds exactly like wet farts. It's rather lewd, and extremely humiliating.

"Goodness gracious me." The old man mutters darkly. "I see."

"I can't hold it any longer... Nooo..." Belle tries to stand up and stagger away, but she's taken no more than six or seven steps when she collapses onto all fours and lets loose. Seeing it from this angle is even more outrageous than hearing it happen behind you. It's the single most degrading and debased thing you've ever seen in your life.

"My granddaughter means a lot to me." The old man says, sounding angry. "She's been teaching me that it's wrong to judge people on their looks, or their sex. And today I did my best not to judge you two ladies, despite your outrageous attire. And what do I earn for my troubles? I find out that you have been making a fool of me the whole time, playing some sick perverse game at my expense. Young women today, my granddaughter being the sole exception, are scandalous whores. The whole lot of you."

"I'm so sorry, Mister." You desperately start to apologize.

"Save it. I've learned my lesson. There's nothing more for us to say."

The man quickly walks away, leaving you two to feel like you've accidentally done a real disservice to feminism just now.

"Note to self." Belle says weakly. "Only use the GutGrimer when in the bathroom."

"Fuck that." You spit. "I'm never using that again."

But your asshole does feel remarkably relaxed, clean, and lubricated.

And despite what you just said, you do retrieve the dildo and squeeze it back into your satchel.

"Shut up." You say stroppily to Belle, as she watches your actions contradict your words.