You had a funny idea and flipped the Awareness switch so Ashley was aware of her change "Ashley's clit will turn into an invisible penis that can become a foot long while erect, but no one but me and Ashley will notice its effects." You wouldn't be able to see either her new snake materialize in her jeans considering you were both sitting down on opposite sides of a table, but as Ashley was talking you noticed her be a bit more hesitant and fidgety.
For sure on Ashley's side she couldn't wait for the food to come and talking to you was nice, but then as you had done something with that device you had... Well Ashley started to feel like her panties were being a little snug. She squirmed her legs a little as she could feel something warm and fleshy start creating a bulge in her panties, and it was kind of turning her on a little. The weird thing that was creeping down her skin tight jeans felt good. Reaching down to touch it... Well Ashley had only touched one once... but it kinda felt like a Penis.
Seeing that Ashley was thinking too much about her dick you typed in "Ashley's invisible Penis will thicken until her Jeans snap." Ashley 100% felt this change happening as her massive engorged member was straining and rubbing against every fiber of her jeans, and the fact that it was groaning was threatening to tear her left Jean's leg at the seams. You yourself couldn't help but you couldn't help but enjoy seeing Ashley's expressions of pleasure and pain as her growing lower body was expanding against her clothing. You counted to you started to hear a tear... One Mississippi, two Mississippi... There was a sound of ripping and tearing of fabric, and then Ashley made a small grunt out of relief and you could feel something splash against your leg a little. Possibly some invisible cum, and then as the penis started softening a little you think you could feel the invisible tip brush against your leg.
After that whole event you said "You ok there Ashley? If you want you can go to the bathroom. Looked like you're holding something in."
Ashley took a glance down and saw her split open jean leg, and a widened hole in her panties which gave you enough time to type out "Ashley is wearing a skirt" She may not be 100% sure what is going on, but at least she may have some way to hide the invisible phallus...
Ashley said "I think I will go to the ladies room..." and then stood up and walked to the restroom feeling the tip of her penis dragging against the cold floor, and the friction was starting to give her a chubby but as her skirt lifted she was just at the door to the restroom and no one seemed to notice... although you supposed no one would notice as the skirt being lifted as that would be an effect of the invisible dick. You had to wonder what Ashley would do in the bathroom.