You and smokescreen have been dating for a while, but you've been busy with work. You knew Smokescreen missed you nut you didn't know he was depressed, nor were you prepared to see him crying. The two of you are happy to be together and celebrate in an unusual way.
Warning: Sexual content

Smokescreen's P.O.V.
(Y/N) is one of our adult friends and my girlfriend. I'm glad Ratchet invented holoforms — even though I got a lecture about not using my holoform to prank humans. It was after I got my holoform that I met (Y/N). Explaining who I am to her and meeting another human to Fowler and Prime was not fun. Fowler wanted to give us a list of rules, while Prime told (Y/N) to keep us secret and for me to protect her.

(Y/N)'s job has been keeping her very busy and away from me for a few weeks. She's even too busy to talk on the phone. I get a text message every day, but it's not the same as hearing her voice or having her here. I spend most of the day in my room. I think the others are enjoying the break from the pranking and foolishness.

It's three in the afternoon on a Friday; I drive by (Y/N)'s house. The car she has been using isn't in the driveway. I was hoping this could mean she's on her way to the base, but the car is parked in the parking lot at her job.
Maybe she'll be done at five and come to the base.
I know it's foolish thinking.

I park my alt mode, and — continuing to use my alt mode — I go to my room and sit on the bed (Y/N) brought. It's funny she bought a queen-sized bed, and I questioned why at first. Now I miss sleeping in this bed with her.

(Y/N)'s P.O.V.
Damn, the job has kept me busy. I haven't seen my friends or boyfriend in weeks. Having an alien as a boyfriend and being friends with six other aliens has been interesting. I'm finally free for the weekend and able to go to the Autobots base.

"Hard to believe a human keeps him in line," I hear Arcee.
"Sure, but who wants to see the kid depressed?" Bulkhead asks.
Damn, I didn't think Smokescreen would be depressed not seeing me in weeks.

Sure enough, I find him lying on the bed I have in his room, crying. I lay on the bed next to him and put my arm around him.
"You big baby," I joke.
Smokescreen looks at me, tears roll down his face, and hugs me.
We sit on the bed and talk about my job and what Smokescreen has been up to.
Is it wrong while we've been apart from each other for a while, I want to do it? I don't know what to think about makeup sex, but I guess that's what my reason is for wanting to do it now — or is it reunion sex?

Smokescreen's P.O.V.
I didn't know (Y/N) would be here, but it's more of a surprise to smell she's in the mood for some fragging. I haven't told her we can smell hormonal changes. Maybe I'll keep it a secret...though how would I explain Ratchet knowing something is up by smelling hormone changes? I'll worry about that later.
Even if she isn't thinking about doing it, I want to kiss those lips.
"...I don't know if I'm going back to my regular work schedule or—."
I interrupt (Y/N), pulling her close to me for a kiss. She hugs me as we kiss as I move my hands under her shirt to find her bra strap. This kiss quickly turns into taking each other's clothes off.
"A-are you sure you want to do this?" I ask.
"Yes."
(Y/N)'s back faces the wall; I push her down on the bed.
"I didn't think this is how we'd—."
It's (Y/N)'s turn to interrupt me with a kiss.
(Y/N) is damn sexy; her ( body size) is perfect. More than her lips deserve to be kissed.
"Smokescreen,w-what are you—?"
(Y/N) stops herself and moans as I kiss various places on her body. It's interesting she wants this but is still surprised with everything I do. This is not what I had in mind when (Y/N) is able to spend time with me; we never talked about when we'd do it, but I like this. Her moaning is sexy and turns me on.

(Y/N)'s P.O.V.
Damn, Smokescreen's holoform is sexy. I know I'm wet down there. Even as I watch Smokescreen rub his rub around my area, I'm still not prepared for the feeling of his spike in me.
"Are you ok?" Smokescreen asks as I deal with a little pain.
Hmm, I should have thought him about the human body as he taught me about cybertronians biology.
"I'm fine," I assure him.

The pain fades by the time Smokescreen decides it's ok to continue. He moves slowly while rubbing my hips and moved to my breasts, smiling at my moans of pleasure. I didn't expect him to pick up speed until my breasts are bouncing.
"S-Smokescreen!"
He keeps going for s few minutes before pulling out and laying next to me.
"That was amazing," he pants and pulls me close to him, "I love you, (Y/N)."
"I love you too, Smokescreen."