You can't believe this is happening to you. You thought the transformation gun would be a fun way to shrink yourself for a little while and see what the world looks like when it's big. And now, here you are, trapped inside a giant woman's panties, being ordered to crawl inside her pussy. You, of course, have no desire to do this. But what choice do you have?
It's not as easy to comply with Mary Lynn's wishes as either of you want. As she drives to the restaurant, her legs are pretty close together, keeping things even tighter than they were before. You could grab onto her pubic hair to pull yourself along, but you're pretty sure that'll just piss her off. So instead you struggle along, slowly inching your way across her vulva, passing over her urethra and a clit the size of your head, until things finally start to open up a bit. You can't see a thing, but you can tell that it's very hot in there. And wet.
So you slide on inside. Mary Lynn's vagina isn't quite as smooth as you expect, but it's not rough either. You don't really know what to do in there, so you keep going, and after a few minutes, you reach something at the end of the tunnel that's kind of hard. You figure that's the cervix. By now Mary Lynn has stopped the car and has gotten up to start walking. It changes your orientation a bit, but you already couldn't see anything, so not much is different. You figure she's walking into the restaurant by now.
As you keep wondering what you should do next, you start feeling kind of woozy.