Swapfell! Sans x Reader A tsundere's love (Completed)

chapter 15: Announcement LEMON

@normal POV@
You start to wake up and hear Viper mumbling. He sounded upset. You yawn and cuddle up to him. "What's wrong?"
"Go check chat…." 
You flip over to grab your phone and look through the messages. You blush deeply at the picture. 
You: oh Sans, how did you get that~ 😑😑😑
Sans: I had to check on you two and had to.
"I'll kill him." Viper growls. You reach over and stroke his skull to calm him down. 
Me: well the sleeping arrangements of me and my boyfriend are none of your business. 
You notice that everyone looks at that message fast.
Blue: I CALLED IT!
Viper: Not. Another. Word.
Me: Viper's just a tsundere!
Everyone else sends laughing emojis. 
(LEMON START)
Viper pulls you close to him.
"Looks like I need to teach you some manners." He growls in your ear and you shiver. Suddenly he pulls your shirt up and uses it to tie your hands. You looked at him surprised. 
"W-what are you doing?" You ask nervously. 
"Giving a punishment, but don't worry, you'll have a good time by the end." Suddenly he's tickling your sides and you squeal with laughter. That lasts for a couple minutes before it turns to him running his hands up and down your sides.
He unhook your bra and unattached the straps on it so they don't break. He stares at your breast before starting to fondle them. You let out a moan loudly, because Pup was spending the night with Blue. 
"Do you like that?" He asks as he gets tougher. You'd had sex with him a few more times after he deemed you were healed but this was different. You were more excited. You moan louder as he got rougher. Viper put his head down and starts nipping at one of your nipples. He was rough and made sure to leave many marks on my breast before repeating the procedure on the next. He sits up and grins at his work. 
"Would you like more?" You shoot up and kiss him. He kisses you back before pushing you back down. "That's a yes. Lay back and let me work." He growls seductively. He pulls off his shirt and uses it to tie your hands to the head board. You stare at him lustfully as he pulls your shorts and panties off. He leans down and you see a blue tongue lick his teeth. He grins up at you then licks your womanhood. You moan loudly and buck your hips. He growls and holds you down before continuing to lick you. Suddenly he thrusts his tongue into you. You start seeing stars as he moves his tongue around inside of you. All too soon he pulls away and flips you over. You hear his pants fall to the floor.
"Are you ready?"
"My god Viper! JUST FUCK ME ALREADY!" You yell at him. He doesn't wait to thrust himself into you. You moan loudly and he thrusts harder and you move closer to him so he goes deeper. You feel yourself coming to a climax but have no time to warn him. He continues to thrust into you and untied your hands. You get pulled so your back is against his chest and he continues to thrust into you. His hands roam your front. Soon his thrusts turn frantic.
"V-Viper…." you whimper. He makes a noise that he heard you. You moan before continuing. "L-let's have a family." His response was thrusting harder while hitting your g-spot every time. You two cum together this time and you feel Viper's seed go deep inside you. You both fall on the bed.
"Did you mean that?" He whispers in your ear.
"Yeah,  let's have a big family." You smile at him happily. "I love you."
"I love you too."
You two fall asleep in each other's arms.