A/N: ew ew ew ew it's the lemon part why did I agree to this

"Really? Oh, yes, this will be wonderful! Come on, Blooky, doll. Don't be shy!" Mettaton grinned and took Napstablook's hand before kissing him hard and groping at his ass. Napstablook responded by clutching at Mettaton's hair, grabbing a fistful with his free hand. You were unable to look away.

Mettaton pulled back from him and said, "Make sure that (Y/N) doesn't get left out, honey."

Napstablook nodded and Mettaton responded with, "Good," before going back to you and roughly slamming his lips upon your own. He lifted you and you grabbed at him tightly before he dropped you onto his bed. Napstablook was already on there, and as Mettaton's tongue wrestled with your own, Napstablook sucked on your neck, occasionally nipping with his teeth.

Mettaton pulled away from you and sat up, pulling your shirt over your head. Napstablook unclasped your bra from behind you. Mettaton slid it off of your arms and tossed it aside. This was absolutely ridiculous, and you were all for it. Napstablook's hands tentatively reached around your chest to grope and knead your breasts. From your front, Mettaton pulled you into his lap and used his mouth on your nipples, sucking and prodding with his tongue. Your breath caught at the sensation, your crotch grinding against him.

You could feel a growing moisture in your panties as the two robots pleasured your breasts. You had no idea that you would be so into this, but apparently it was right up your alley. Mettaton bit you rather harshly and you whimpered, your legs tightening around him.

"M-Mett, I think you're h-h-hurting her," Napstablook piped up.

"Well, do you want a try? Come over here."

Napstablook released you and crawled over to where Mettaton was on the bed. Mettaton smirked and moved out of his way. Napstablook gently laid you on the bed before picking up where Mettaton had left off, licking around your nipples hesitantly, but he was encouraged by the sounds you were making. You felt hands at your waist pulling down on your pants, so you lifted your hips to help. Your pants and panties were both pulled off by Mettaton with only a slight struggle.

You suddenly felt something warm and wet on your entrance, "Oh, fuck, Mett. At least a warni-ahhh." You were unable to finish as his tongue licked up your slit again leaving you to sigh loudly. A moment later you heard Napstablook gasp and he stopped what he was doing to cry out.

You glanced past him and saw Mettaton, still lapping up at you, now with a finger in Napstablook's opening as well. Napstablook whimpered and wriggled over you. On some strange impulse, you grabbed his hair and pulled him down to you, meeting his lips with your own. You weren't gentle with him, you were harsh, thrusting your tongue into his mouth and refusing to let him take control. Your hands tangled into his white hair and kept him lying on top of you.

You felt Mettaton's warmth leave you as he remarked, "Well this isn't very  fair to me, now is it?"

He pulled Napstablook off of you and brought him to his pink dick. Napstablook obediently closed his mouth around Mettaton's length and sucked while lightly wrapping his hand around his own. Mettaton moaned loudly at Napstablook's actions. The smaller robot was obviously a pro at this.

Watching Napstablook go down began to get you hot and bothered, and you slowly brought your fingers to play with your clit. Mettaton noticed you and began watching as you played with yourself. You slowly began to tease yourself more, slipping a finger into your entrance. You spread your legs wide so that Mettaton could get a full view, thinking of what he would do to you as you pumped your fingers in and out. His lovely moans as Napstablook blew him filled the entire room, and it only made it easier for you to continue adding fingers, stretching yourself more.

"Oh, oh fuck, darlings, I need to have you both right at this moment," he gasped out desperately.

"What?" You questioned.

"(Y/N), Blooky, I need to feel the both of you. I can't take the teasing and the waiting any longer." Mettaton pulled out of Napstablook's mouth with a slight pop and took your hand from where it was in your pussy, licking your fingers clean before lining himself with your entrance. His tip stimulated your already sensitive pussy and it made you desperate for him inside you.

"Just go ahead, Blooky, I'll be fine."

Napstablook hesitated, but took a deep breath and delved his cock into Mettaton's ass. Mettaton cried out, but you couldn't tell if he was in pain or if he was feeling pleasure. Mettaton thrusted himself fully into your ready opening, resulting in your moaning loudly. The three of you struggled slightly to find a pace, but you eventually reached it. Napstablook thrusted into Mettaton who in turn thrusted himself into you. Each time Napstablook hit him in the right spot, Mettaton would cry out and his dick would be shoved deeper into you.

The moans and whimpers of all three of you filled the room, making it even more impossible to even think. It was hot, it was messy, it was amazing, and you didn't want it to end.

Mettaton was the first one to let go, screaming out loudly as he came inside of you. He was exhausted and weak to continue, so Napstablook pulled out of him and shoved his dick into you. It was an entirely different feeling from Mettaton's way of fucking you, and when he came it sent you over the edge.

The three of you lay in the bed afterwards, Mettaton holding each one of you on one of his sides.

"That was fucking wonderful, darlings," he panted.

"You know, I actually wouldn't really mind something like this again. This was probably the some of the best sex I've had," you remarked, tiredly cuddling into Mettaton's side.

"E-e-even with m-me as a part of i-i-i-it?" Napstablook stuttered.

"It wouldn't be the same if it wasn't all three of us, Blooky." Mettaton said.

"Mhmm," you agreed.

Robots sure had one hell of a way to brighten your mood.