Neither Lisa nor Twelve were very physical when it came to their relationship, nor vocal. When it was clear they both cared about each other differently than they did Nine, it had kinda just happened. Not much was said, and not much changed. Only when Nine was too tired, they'd go on little outings together, and maybe they'd hold hands or give the other a peck.
So it's a cold winter night when they share a bed for the first time.
"Twelve?" He opened his eyes to see a Lisa swallowed up by oversized penguin pyjamas .
"Yeah?" A yawn escaped as he tried to wipe away the sleep in his eyes.
"Oh, I shouldn't have woken you up, that was thoughtless, I'm sorry," She looked ready to scurry back to her room.
"Nah, it's cool, what is it?" He leaned up to look her in the eye. He had found it can be like pulling teeth to get her to voice a problem, and Twelve had to work to make sure she's ok.
"I know this is kinda weird, sorry, I'm just kinda-" She fidgeted nervously with a strand of her hair. "-cold? Could I sleep with you?" She asks like she's asking for the world, not just a simple request.
"Sure." Twelve cocked his head to the side, trying to understand her embarrassment. He used to sleep with Nine all the time, is it because she's an only child she's nervous?
At his compliance, Lisa tentatively climbed in to join him under the heavy covers. He couldn't help but smile at the cute way she snuggled in.
"Why were you so freaked out before?" At his words a bright blush spread across Lisa's face.
"Oh," It came out in a tiny squeak. "It's just you know there are certain," She averted her eyes at this. "Things couples are expected to do when in the same bed."
A second goes by before Twelve picks up what she's getting at, and his face flushes just as red.
"Oh," He repeated, starting to feel awkward. "Are you saying you want to-"
"Not really. But if you do-"
"No I'm good, unless you want to-"
They sat in silence, trying to process what just in fact was going on. Suddenly a lighthearted laugh escaped Twelve's lips.
"Pfft."
"Heeh," Lisa giggled in reply.
"How about we settle for this?" Twelve tangled his legs between her's and snaked an arm around her waist, pulling her closer. "Better?" He looked down at the raven-haired girl.
"Mmm, better." She nodded before pressing a quick kiss on his nose.
"Good." With that they both closed their eyes as the snow fell outside.
A.N. I usually headcanon Twelve as demisexual, but I've been meaning to write something about an asexual couple dealing with dating norms and all