She is scared to find out.

“I-I haven’t really found the limit. I got to half my pre-mobile size and chickened out. It was tens of gallons of jizz many times over several days just to be able to get back to work. My cock was like as thick as, well, you!”

You bend slowly at the hip. Felicity eyes you as you approach her leaking cock. You look her in the eyes as you lick up her cock slit and swallow. You hear a gurgle from her balls.

“I-I...” she trails off.

You reach back and spread your butt. Jay finally extracts herself from you. She stretches and walks around you to introduce herself. Felicity jumps in surprise as she speaks.

“Hello, I’m Jay!” She puts out a cummy gummy hand, which Felicity accepts. “Careful with her cum, baby. She is extremely fertile. Like she could knock up your ass extremely fertile. No offense,” Jay finishes her warning with an apology.

“None taken. You were...?”

“Stuck in my butt. It felt great, but now I feel empty. I want to see you get as wide as me, so I’m hoping teasing you helps that happen faster?” You eye her visibly swelling cock and balls.

“Y-Yes, but...” Felicity seems to be letting her cock do the talking and overriding her brain.

“You want to impregnate me? Jay says you are so potent you can even impregnate my butt. I want a real geyser though, and my butt needs a real stretch. It’s more of a pussy that goes from my abdomen to my tailbone, so I’m curious to see how one big dick makes me feel. Oh and of course I can’t wait to see how pregnant I get!”

“I better call in to work and tell them I got a flat or something...” Felicity replies as she goes to get her phone.

“You have a type, baby,” Jay tells you with a knowing look. “She was a beta tester for Cockbot’s early models. Got royally fucked...before the company pulled support for her model and by extension, her too.”

“They don’t make em like they used to?” You surmise.

“And they won’t again,” Felicity says as she returns. Her package has doubled in size and sways, bobs, and bounces with her step. “It won’t get much longer, maybe 24 inches, but I can feel the girth starting to weigh it down.”

“How do we stop it once we get big enough?”