~Nightmare Sans x Reader~

~Chapter 3~(Smut)

~3 Hours later~

You starts to get really bored and a little horny for no reason at all, but you started to have feeling around Nightmare like really sexual feeling towards him every time you're near him."Hey is everything okay?" Nightmare ask's you as he holds your hand."Yeah I'm just a little bored is all." You say as nightmare takes you to his old room."What are we doing in here?"You ask as he locks the door behind you guys."Well I saw you were bored and I just wanted to get you away from everyone out there."Nightmare said as his hand went up your shirt."Uh Nightmare what are you doing?" You questioned as you grabbed Nightmare's arm."Awe come on don't act like that I just wanna have some fun~"He said as he pinned you to the wall."Nightmare please stop there are other people in the house." You say, but you kind of want him to yourself."Oh don't worry I'll text dream telling him I'm going back home." Nightmare said as he started texting dream, but then nightmare grabs you by the arm and teleports you to his room."Well now that we're all alone now~" Nightmare said as he pinned you to the wall. You feel a shiver run down your spine. " Awe what's wrong doll face, you know you shouldn't try to struggle I saw the way you looked before I came up to you~" Nightmare said as he kissed you, you hum into the kiss as you kissed him back. " So your not trying to fight back~?" He said as his hand went up your shirt. You moan as he kissed you neck without warning. Soon he stopped kissing your neck and then picked you up and put you on the bed. " Ok listen we're gonna do this my way, but if you try to stop me from doing anything to you I think you might know what's gonna happen~" Nightmare then takes off your pants and begins licking your inner thighs. You moan quietly trying to not alarm the anyone that could be in the castle, but then that's when you feel something wrap around your arms, you see tentacles around your arms from nightmare.

" Awe what seems to be the problem you don't like this?~" Nightmare said in a seductive way, you blush a light red as his continues to lick your inner thigh while he starts bringing his tongue up, you start to moan a little louder on accident. "Hey it's ok the walls are sound proof so you can moan as loud as you want~" He said as his tentacle started rubbing your back, but you knew exactly what he wanted you to do, but you wanted to refuse until you remembered what he told you before he started playing with you. " Oh so I guess you know exactly what I want~?" Nightmare said. After he said that he, without warning, sticks his tongue inside you, you moan louder when you start to feel his tongue inside you already. You try to cover your mouth from moaning but Nightmare's tentacles grip your wrist's tight. "Don't even try to cover your mouth from moaning, and don't try it again~" He said as he pulled his pants off. You try to talk things out with Nightmare until he pounds right into you without a single warning, you start to moan in pain as he starts thrusting into you really hard , but after a minute of it hurting it started to feel very good you moan a lot into every thrust. " Damn this is tight as fuck but I'm pretty sure I can handle it being this tight~" he said as he pounded into you hard making you moan in pain a lot, you want to tell Nightmare to stop but at the same time you want him to keep pounding into you as hard as he can, and you really are enjoying every single bit of it.

After about 10 minutes of Nightmare pounding super hard into you, you start to feel a knot from Nightmare "Listen I have one question for you y/n, do you want in or out?" Nightmare says as he stops thrusting for a minute. You know exactly what he means by that so you say in like the horny bitch you are. "Well ok whatever you say, oh and just to let you know you might wanna take a pregnancy test in the morning." Nightmare says as he thrusts into you even hared than before. You moan as you can feel he's about to cum all up inside you, but you really don't care because you really want Nightmare and you love him so much. Not even 5 minutes later Nightmare cum's inside of you, as you both moan and as he finishes he lays down right beside you in bed. " Wow I never thought I'd still know how to do that." Nightmare said ad he kissed you on the cheek. You say that you never had sex with anyone before at all and that it was your first time doing it with someone. " Well I think we should take a shower to get all cleaned up." Nightmare said as you and him both walked into his bathroom and got into the shower. You and Nightmare start to make out in the shower for at least a minute.

After the shower you and Nightmare both get dressed and both lay down. You ask if the other's are coming back to the castle right now. " Oh them? No there spending the night at Dreams place since Dream let them just for the night." Nightmare said as he starts to cuddle you. You say ok and that you love him." Awe I love you too doll face~" Nightmare says as you and him start to drift off to sleep.