You pretend it's a side effect of the brown pen.

After thinking through the problem a little, you look at the box on the floor.

"Hey, what is that? There is another pen in the box!" you say, trying to pretend you've just noticed it.

You grab the brown pen and look at it.

"Wait, Trish! We don't know what that pen does, maybe it could be dan..."

You zap yourself with it.

"...gerous."

As Jessica's memories flow into your head once more, you make your dick come out of her pussy.

"HOLY SHIT!!!" Lauren screams in terror, "TRISH, YOU HAVE A DICK!!!"

"What the fuck are you talking about, Lauren?"

"LOOK!!!" she says, pointing at your waist.

You look at where she is pointing and do your best to look as surprised as Trish would in this situation, which is easy because you still have access to her memories along with that of Jessica.

"AAAAAAAAAARRRGGGHHHH!!!!!!" you scream, doing a fantastic job at pretending to be horrified.

"That pen gave you a dick!"

"Yeah, thanks Lauren! I have noticed. But...how do I get rid of it?"

"Zap yourself again, maybe that will work!"

"Or give me a second one..."

"Do you have a better idea?"

"I guess not. Alright then!"

You zap yourself again and again with the brown pen. It has no effect, real or imaginary.

"It's not working!" you say.

After about half an hour of pretending to try to get rid of your dick, you then finally say "You know, however much I wanna get rid of this thing, I gotta say, it could help with the video.

"Excuse me?"

"When you rubbed your pussy on mine last time, you had trouble doing it in a way that was pleasurable. You won't have that problem if I have a dick you can ride..."

"Trish, that pen has grown you a cock and you're thinking of me riding you?"

"We've tried everything to get rid of it, Lauren and nothing worked. Now that I'm stuck with it, might as well make the most of it. We'll film the video in a way that won't show it on camera, so the girls will still think I have a pussy..."