"Eh, why not."

Mold is too modest a word. It appears to be moving.

"Uh..."

"D'you happen to have a large quantity of bleach? Or maybe, I don't know, refined phosphorous?"

"Careful, we just might make it angry."

"This is not something I want to share oxygen with. I don't recognize it, but I've seen similar. On ships coming back from pest extermination missions."

"Oh, I thought it might have been a relative of your lot or something."

"Probably not. There's at least three different - breeds - running around out there. Lilithian, Frankensteinian, and... I don't know, Cryptozoological? I think this thing is in category three."

"Good, good. Was worried it might be someone's kid."

"No. No... You know, if it's been here a while, it's probably not doing any immediate harm and I suspect there will be things about this ship that worry me more. I'll deal with it later."

The idea sounds almost physically painful to him, but off he goes.

Meanwhile, the children are playing violently in the woods... if very quietly.

A birdwatcher has noticed the commotion.

He's watching them play through binoculars from some distance away, stuck between fascinated and terrified at their obvious Lilithian nature.

Zeke has noticed. "Um, guys, can you smell human? Really kind of scared human?"

"...Uh oh. Act normal." She pushes Zeke into a puddle.

This might be difficult, since the twins haven't bothered getting dressed because of all the shapeshifting. 

Hopefully this guy will think they're part of some strange nudist cult instead of being shapeshifters.

...Nope, doesn't seem to be happening. He's still there.

Zeke picks himself up. "I'm gonna go tell him how normal we are."

"What is your species, Lilithian child?" The guy immediately asks.

"Lilithian? What's that?"

"'Lilithian' is the taxonomic class of humanoid shapeshifting sapients, like you. Such a terrible shame, what a lie, those warmongers in Parliament don't like your lot!"

"...Uh, shapeshifting? What are you talking about?"

"I am not a fool, youngling. Your body is obviously superhuman, with the strength of those leaps and the damage to the foliage... You do not bear the telltale signs of being a biological experiment. Tragic, ugly things. Thus, you are Lilithian."

His enthusiasm and wonder has well taken over his fear by now.

"Um, yeah, okay, you got me." He twirls a bit. "Come on guys, he's friendly!"

Far too suddenly to be anything other than unsettling, Janet is there, her hand resting heavily on the biologist's shoulder. He jumps, but tries to pretend nothing is wrong. "Sir. You understand that privacy is of significant importance to people like us." Her grip tightens marginally. "I know that you meant no harm, so all will be well after you leave now and return home and speak to nobody of what you found here. Yes?"

"I, er- Yes. Yes, of course, sorry to be a bother."

"It's quite alright. I'll be happy to escort you back to the trailhead." Her tone says 'this is not optional'. "Zeke, have the others dress and wait for me where we had breakfast two days ago." This is also not optional.

"I'll do that," he looks at the biologist. "It was nice meeting you."

He runs back to the others. "Janet says we need to put pants on and meet her at the breakfast spot."

"She's kind of scary, isn't she?" Asks Sam on the way.

"Yeah. She was real not-mean to that guy."  He sighs, "It was nice being properly us for a bit."