Prompt: What if Vastra, Jenny, and the Doctor find out that Jenny isn't just human but part alien as well. And her life span is as long as Vastra's.
Vastra paced inside the Tardis, furious the Doctor kicked her out of the room and with herself. She knew her wife was hiding something from her. Severe migraines, inexplicable aches and pains, and now fainting on the Tardis, it was not "just a cold" as her human kept telling her.
The Silurian hissed under her breath as she paced. The door finally squeaked open and Vastra bolted in to her human who was looking at her guardedly.
"What is wrong?"
The Doctor looked excited as he answered. "She's metamorphosing."
Vastra froze, looking at her wife who wouldn't meet her eyes than back to the Doctor. "What do you mean."
"She's a Tenran. Nomad species that float around space until they end up on a hospitable planet. Initial body morphs to look completely like a local species until they reach their equivalent of puberty. Longer lifespan, an appetite for orange things, changing eye color, maybe a horn or two, her species is highly variable in that state. Wonderful mechanism."
Jenny cleared her throat and looked at the Doctor. "Can you give us a few minutes alone?"
When the Doctor left, Vastra tilted Jenny's head up to look at her. "So, you're alright then?"
"Yes. The changes should be nearly done I think."
Jenny smelled different yet there was something still distinctly "Jenny" about it. "Don't ever hide something like this again or I'll devour you."
Jenny smiled tentatively. "I probably won't taste as good anymore, being not human and all."
"I will just slather you with sauce of some sort then. Why didn't you tell me?"
"I didn't know. We don't remember until the second change. You-you're alright with this? Me being not human?"
Vastra pulled Jenny into a hug. "Of course. You are still the same foolish mammal I fell in love and married."
Jenny let out a breath in relief. "That's me, the silly ape."
On the outside, Jenny still looked the same physically. No horns, spikes, skin color change, or drastic amount of hair growth thankfully. Her species began or perpetuated the werewolf and yeti myths after all.
On the inside, there were many changes. Some were helpful.
Jenny watched dumbfounded as the shallow cut healed before her eyes. After a few seconds, it was fully healed. She flexed her hand and noted there was no pain. She stared at her hand for a second longer before shaking it off and going back to cooking.
Other were not so great.
Vastra watched her wife with a mixture fascination and horror as Jenny finished her fifth plate of food and reached for another helping. She made a mental note to remind Jenny to increase their funding for food since she ate everything in the house.
And others...
Vastra hissed at the Nazi officer, hands itching to tear his face off.
"Ma'am, you can't eat him."
"He refuses to talk, so he's only good for a meal."
"Hmm, you're right. Carry on then."
The Silurian grinned viciously at the slightly panicking human. "Now, which part to eat first?"
"The legs got the most meat."
"You're right, the legs will go first. I am ever so hungry."
As Vastra moved to tear off said limbs, the man started blubbering away about their attack plan. She smiled as Jenny began writing everything down. Hopefully this will save a few more lives.
Others were perfect.
Vastra snuggled against her wrinkly wife as they watched TV. She squinted at the screen but couldn't make out the colorful images and was too lazy to get her glasses.
"Is this another one of your soaps?"
"Yes, now hush. The husband just learned his wife is an alien and they have an alien baby."
The Silurian rolled her eyes but stayed quiet, content to listen to TV drone on.
Life was good.
Meta: Basing off Tenza species. Change it a bit since I think Tenza!Jenny would have (attempted to) tear apart the Whispermen, snowmen, etc. with them psychic powers like George Thompson. Whispermen got nothing on Peg Dolls.
