Gaster x Reader (Probably will be a Lemon)

After eating a delicious batch of pancakes with Gaster and the boys, you all stay and have a conversation together, something that they obviously don't do enough time with each other usually. It makes sense, Gaster is always working so you don't blame the boys for being exited to talk to him. You stand up quietly and walk to your room, Gaster glances at you as you left but when he saw you smirk at him, he kept talking to his boys.

Gaster's POV

I promised (Y/N) that I'd spend today with her and I intend to but, my boys are wanting to talk and have fun with me seeing I'm home. I don't know what to do, (Y/N) is obviously ok with me talking to them but, I want to get to know her, maybe even ask her out on a date? That's it! I'll spend the day with the boys and then take (Y/N) our for dinner. That way all four of us are happy. But, where would I take her?

That weird POV

You walk into your room and gather your things to head out, you're going to go to work, it's all you really know how to do. But, you know you can't just walk out the front door so, you change into a pair of black skinny jeans, a tight fit (f/c) t-shirt and a (s/f/c) hoodie and carefully climbed out the window, sneaking away to the lab. Alphys should be there by now right? you thought to yourself as you started running towards Hotland, wanting to get to the lab before Gaster realised you'd left. (wow reader shame on you, gaster loves you...) You get to the door of the lab hot, panting and ever so slightly sweaty (Or really sweaty if you're unfit like me) and knock on the front door of the lab. It opened slowly to show....

"Gaster?" you said, startled.
"You forget that I can teleport (Y/N). I heard you leave through your window." He smiled at you, amused that you tried to get away from him.
"Well, I thought I might get some work done while you were talking to Sans and Papyrus. You know... To use my time affectively..." You say, slightly flustered. Walking into the lab.
"Oh yes of course (Y/n) but, I told you not to work today..." He grabbed your shoulder lightly and spun you around to face him. A smirk plastered across his face. You giggled.
"Whilst that is true... and you may be my boss but... You shouldn't stop me from working." You shake his hand off and walk towards your desk.
"Besides," you say, "Working is something we are used to doing together. We don't really know how to interact with each other outside of work." You reach into the bottom draw of your desk and bring out your spare set of clothes, to get out of your sweaty ones.
"Well I wish to change that (Y/n)" He says blatantly and you blush ever so slightly.
"Um... What?" you turn to face him, your back now facing your desk. He takes a step closer.
"I said, I want to change that." He takes another step closer to you and leans down towards your face.

You move to step back from Gaster but, you remember that you're at your desk. You blush a bit more and Gaster chuckles.
"You seem nervous (Y/n). Don't be. You know I won't hurt you." he puts his hand up to your cheek and gently caresses the side of your face.
"I-I know that. Um... I need to go get changed... so uh..." You slip out to the right of him and grab your clothes, walking quite quickly down the hallway to the staff bathroom, slipping into a stall and locking the door before resting your back against the door sighing deeply. What has gotten into him? That was a bit much.

Gaster's POV

I sit down on (Y/n)'s desk, blushing like crazy. What is wrong with me? Then it hits me. What day is it? He looks over to the calendar. Oh. I'm in heat. He stands up and starts walking to the staff bathrooms to wait for you outside them. Ok, I don't want to scare her. But, I have to make it up to her.

The other POV

You step out of the stall, now wearing a dress shirt (The fancy white ones that you wear for business jobs) and a black suit skirt, with a pair of black heels. You walk over to the sinks and lean on the counter, looking into the mirror. You take a deep breath and walk towards the door. Opening it, you see Gaster, posted up on the wall waiting for you. You smile at him and then start walking back to your desk.
"You know (Y/n), that isn't the best attire to walk back to snowdin in." Gaster says walking to catch up to you. If you had been facing him, you would've seen him staring at your ass.
"That would be because I'm not going to Snowdin Dr.G, I'm working." You say getting to your desk and putting the clothes you changed out of in the bottom draw.
"But, I told you not to work today."
"That is true but if both of us aren't working we will fall very behind on our latest experiment." You say, sitting at your desk to go through paperwork.
"(Y/n)..." Gaster's voice was soft and soothing. You turn around to face him. A slight blush on his face.
"Come here." He smiles softly, you stand up slowly and walk over.
"Yes Gaster?" You look up at him, smiling sweetly.
"Do you uh... want to go out... tonight? For dinner I mean." His blush deepens.
"Ok sure. Why not?" You start to walk back to your desk, confused as to why he made you walk over to him but, he lightly grabs your shoulder, spinning you around to face him and plants a small kiss on your lips. You're surprised but smile at him.
"Um Gaster?"
"Y-Yeah?"
"That was sweet but..." a small frown grows on his face but before he can say something you grab his shirt collar and pull him back down into a kiss. He wraps his arms around your waist and pulls you in closer to him, you let go of his shirt and wrap your arms around his neck, when you pull back you realise that he teleported you both back to the house. You frown at him.
"Hey. I told you that you couldn't work today." He smirks at you.
"I hate you." You say turning around with a over exaggerated pout on your face.
"This says otherwise." He spins you around and pulls you into another kiss. You immediately melt into this one too.

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1157 words. I really wanted to get this out for Australian Valentine's Day But, That's today soooo.... happy Valentine's Day to all you Americans!!! Ok bye.