"I'm sick of being a normal person," says Mary Lynn. "I always knew I was better than all of you, and now I'm going to be able to prove it." You've got your head poked out of Mary Lynn's bra, and you've mostly been looking at the calm and confident expression on her face. She looks like something has happened to her for which she's been waiting a long, long time. You realize as soon as you see it that Mary Lynn is on a power trip, and it won't stop until she loses control of the gun.
You notice Mary Lynn sashaying back and forth, so you look down to discover that she's also taking off her pants and shoes. Apparently this experience is making Mary Lynn feel liberated of clothes too. Now she's down to just her black bra and her powder-blue cotton panties. For a librarian, and one in her late 30s or early 40s at that, Mary Lynn really has a pretty nice physique. You've been enjoying her nicely sized and still-perky breasts while in her bra, but she's got a hot body all over.
Of course, that thought keeps you distracted for a while, right up until Mary Lynn enlarges herself again. By the time you notice what's going on, she's again taller than all the buildings on campus, hundreds of feet from head to toe. In fact, she's even larger than the first time she grew herself, which you note is probably not a good sign. The long drop to the ground is making you dizzy, so you shift around inside Mary Lynn's bra to look back up at her. Still, she's looking out across the horizon as if you're not even there.
"So, what should I do first?" she asks, probably only to herself even if the whole town can hear her. "Should I take over the world first, or have some fun? I wonder what Amber's up to? She'd get a huge kick out of this. Heh heh, huge."
From her tone of voice you assume Amber must be a friend of Mary Lynn's. You shudder to think what two of these giantesses would be like.