BrawlerGamer - maybe but I don't write many 6-7k chapters! Ideally I need another chapter to round it off. This may require thinking

DyingSunlight - the beauty of your review is this whole fic was built on a one shot request specifically about Hiccup being Astrid's teacher.

Ok, this chapter actually takes place in the past. Think... right after Valka and others find out these two are dating, when they now call each other but don't live together. Somewhere around that time.

And be warned; I've never written phone sex before. I've only had phone sex twice and they were both horribly awkward incidents... she came, but still.

-HTTYD-

Hiccup looked up as his mother kissed his forehead, exchanging goodnights and she and Toothless headed for her side of the house. He stood and stretched, scar protesting slightly as he stretched up on his toes before sighing deeply.

Back in his room, Hiccup took off his tunic and felt a little awkward as he waited - Astrid had made a request of him, now they were just waiting for the safety of their mothers having gone to bed. Hiccup would die before he had his mother overhear him having phone sex.

"Clear. You?"

"Five minutes."

Hiccup needed that time to compose himself, despite the fact part of him was very interested. His cock was already filling out against his thigh, knowing he was about to hear Astrid's voice and craving the breathy tone of arousal from her.

His phone began vibrating again five minutes later, Astrid's name flashing up across the screen and Hiccup answered it hoping his voice didn't quiver with nerves.

"Hello?"

"Evening professor" something about the way Astrid said that went straight to his cock "everything clear your end?"

"Uh, yeah. Just... I've never done this before."

Astrid chuckled lightly, the sound still lightening him inside even over the phone.

"I figured as much. But try not to think too hard, just think like I'm there with you."

"Ok... you're going to have to start this though."

He could have sworn he heard Astrid roll her eyes, but there was no annoyance in her tone when he heard her mattress creak as she got comfortable, then started talking.

"Did you get naked like I told you to?"

"N-no. I took off my shirt because that would be harder to take off while on the phone."

She tsked, but Hiccup didn't feel like he was in any real danger.

"So what are you wearing now?"

"Pyjama bottoms and boxers?"

"Lose your bottoms."

Hiccup awkwardly wriggled out of them, erection straining against the soft cotton of his underwear and sensitive to even the brush of his arm over it as he pushed off his bottoms.

"Done."

"Now we're even" Hiccup's breath hitched "because I'm only in pants. Those cute little green ones you like, the ones I had on when you were looking up my skirt, and when I hid under your desk to suck your cock."

Gods, Hiccup still couldn't quite believe that had happened. His cock gave a twitch, letting him know it would quite like that again.

"And then you bent over my desk with your ass in the air."

"Still one of my favourite memories."

"Still my favourite underwear."

"You're welcome to borrow them. I bet your cock would look cute in lace... not as cute as it would in my mouth, obviously. Fuck, I get wet just thinking about your cock."

There it was, her breathy tone that lit a fire in his belly.

"I have a feeling they wouldn't last long, you're always trying to get my pants off."

"They get in the way. Not my fault. Touch your cock babe, tell me how it feels."

He felt a bit stupid, but Astrid sounded so hot and he could just see her spread out on her bed, cute little lace damp with arousal and her bare breasts topped with pebbled nipples. He stroked his shaft through the fabric, cock jerking as it was finally touched.

"Uhh, better when it's you."

"Mmm, I'm touching my boobs and it's not the same as when you do."

Hiccup swallowed his nerves - Astrid wasn't ashamed of her sexuality, why should he be?

"Wet your fingers, then rub your nipples. Slow circles, tease yourself like I do."

If she noticed the sudden shift, she didn't complain. He heard the wet sound of her placing her fingers in her mouth, then soft moans as she complied with his instructions. His cock leaked precum as he pictured Astrid, biting her lip and touching herself.

"Now pinch it lightly, not too rough."

"Fuck Hiccup, keep going."

She moaned his name and his boxers grew sticky, a dark spot growing as he leaked arousal.

"Now the other one."

He heard Astrid fumble to change hands, swearing in her haste and he had to bite back a laugh at her exuberance. Hiccup gave his cock a squeeze but focused quickly back on Astrid; he was getting into it now.

"Need you babe, your mouth would feel so good right now."

"I was just thinking the same thing now you got me thinking about those cute lips of yours."

Astrid whimpered, sending a pulse of heat through Hiccup's body.

"Tell me."

"Tell you what? How I'd fill that smart mouth of yours with my cock?"

"Hiccup... Gods, keep going."

He pushed his boxers down, needing to touch himself before he lost his mind.

"You're always so eager, and your mouth feels so good Astrid. I love seeing your pretty pink lips wrapped around my cock."

What was he saying? He half-expected Astrid to tell him to piss off, but she didn't. She cursed under her breath, moaning and Hiccup stroked himself to those sounds.

"Does it make you feel good when I'm on my knees for you?"

"Not as good as when I'm on my knees for you Astrid."

She moaned again, raw and primal and his cock jerked in his hand, motions speeding up.

"My fingers are no match for your cock, I've got three in me and it's not... not enough."

Hiccup had to squeeze the base of his shaft hard to stop himself coming at the mental image, picturing Astrid with her hips arced up, trying to get her own fingers deeper inside herself.

"Did you take off that cute bit of lace?"

"No... that's your job. I love when you tear them off and go down on me, Thor your tongue is fucking evil."

He ached to taste her, sweet and sensual as she soaked his face. Astrid was like a drug, everything about her a potent addiction. Hiccup lost himself in those thoughts for a minute, tugging his cock roughly.

"Hiccup... don't stop."

"Sorry, you kinda melted my brain."

"You have that effect every time you fuck me."

"Gods Astrid, this isn't enough. I need you, with your hands in my hair as my cock pushes inside you"

"Your fingers bruising my hips so I feel you for days"

"Your nails in my back as you moan into my mouth"

"Your teeth in my skin leaving marks all over me."

Hiccup didn't know if phone sex generally meant finishing each others sentences, but he didn't care as they painted the image together. He couldn't take much more of listening to Astrid moan and gasp her words out, cock bursting with arousal.

"Fuck me babe, wanna feel you come in me soon."

They had both gone for the Sexual Health check up, waiting for the all clear that would have them ditching condoms. Hiccup shuddered thinking of their bodies without barriers; he had never experienced it, wanted it to be something he only shared with Astrid.

"Soon milady."

"Fill me up, need you to fuck me until your cock explodes all over me. Still want you to come all over my boobs, make a mess of me like only you can."

"Fuck Astrid, gonna come."

"Ugh. Me too, thinking of watching you pull out and stroke your cock to come all over my stomach. Would you watch me run my fingers through it and put them in my mouth? Watching me eat you all up?"

Hiccup could barely see for the images flashing before his eyes, barely hear anything over the blood roaring in his ears.

"Close..."

"Coming, f-fuck!"

Astrid obviously dropped the phone, her moans quieting slightly but Hiccup still listened to every sound hungrily as his mind sought images of the way her eyes closed and her back arched, her thighs quivered. His cock finally spilled, white splattering across his stomach and up to his chest as he groaned, thrusting his hips up into his fist for the last few spurts.

"H-Hiccup?"

She was as breathless as he, both panting heavily as they tried to recover from the orgasms that had ripped through them.

"Did you drop the phone?"

"A little bit. Fuck, that was awesome."

"Really was."

"If you're half as messy as I am, we better go clean up. Text me?"

Come painted across half his body; Astrid had a point.

"Will do. Bye."

"Bye."

They hung up, Hiccup reaching for the baby wipes in his bedside table to clean himself up. The downside of this Astrid-induced climax was that she wasn't there with him, sharing post coital kisses and touches. He pulled up his boxers and hunted out his pyjama bottoms from the bottom of the bed, pulling them back on.

"I don't even care if it makes me a dork. I miss you."

"You're a dork, but I like it. Miss you too."

Hiccup reached for the pillow next to him, cuddling it against his chest. Phone sex lacked the intimacy he craved, but he couldn't deny it had been hot listening to Astrid like that.

He went to her house the next day after college, both exhaustively reaffirming that they much preferred it in person. Hiccup had a sudden flash of inspiration when Astrid began stripping off, red lace curving over her ass that day.

"Lay back."

Astrid did so, looking up at him with curious eyes.

"Wet your fingers, play with your nipples."

She complied, sucking teasingly at her fingers before circling them around her breast, encouraging her nipple to swell with blood the way his cock was doing at that very moment. She pinched the peaked bud, moaning softly.

"Still not as good as you."

"Maybe, but fuck you look hot."

That seemed to spur Astrid on, now doing the same with her other hand to pinch and tweak at both of her breasts, squeezing the firm mounds.

"Play with your cock babe, I wanna see."

He didn't need to be told twice, pushing down his bottoms and watching Astrid's expression grow hungry, feral as she saw him stroke the swollen length.

"I got a better idea. C'mere."

He got Astrid to lie on her back lengthways across the bed, so he could still see the length of her body but where her mouth was reachable.

"Touch yourself."

She smirked playfully, placing one hand on her stomach. Hiccup growled in warning but she didn't falter.

"I'm touching myself."

"You know what I mean. Touch your clit, wishing it was me getting you all hot and wet."

Any awkwardness he felt for his words evaporated when Astrid moaned aloud, hand slipping beneath her briefs to tease soft whimpers from herself.

"You're gonna touch yourself and suck my cock, make us both come all by yourself."

"Gods Hiccup, fuck yes."

Astrid's mouth was soft and welcoming as he pressed into it, knowing that as he watched Astrid push a finger inside herself that between physical and visual stimulation, he wasn't going to take long. She sucked him eagerly, tonguing his shaft and suckling at the tip, moaning as she pleasured herself.

Hiccup backed off to let her breath, gorgeous chest heaving as she panted and moaned and craned her neck to chase his cock.

"Take off your pants" Astrid complied, stripping the red lace off to lay naked on her bed "now put three fingers in, like last night."

She bit her lip, whining as she filled herself and looked up at him with her most innocent expression, waiting for more. Gods, Hiccup wasn't sure he could match this girl but he was damn well gonna try.

"Hiccup... need your cock."

Astrid knew he couldn't resist the way she did that, breathing his name out that way.

"Don't worry, you'll get it."

He slid his cock back in her waiting mouth, staring at where she was fucking herself on her fingers, curving her hand to rub her clit with her palm and never faltering in the rhythm of her mouth and tongue on his cock. The moans vibrating on his shaft were too much; he couldn't hold on.

"Fuck, I'm coming-"

His words cut off on a moan as Astrid swallowed him down, falling back on the bed to finish bringing herself off.

"Stop."

She whined, obviously close but Hiccup wanted to be greedy, wanted to be the touch that brought her off. He circled the bed, gazing at her naked body all flushed and needy with her fingers inside herself. Hiccup pulled them out and sucked them into his own mouth, loving the taste of her as he replaced her fingers with his own inside her, barely a minute later feeling her come hard on his hand.

"I don't know what that was" Astrid gasped, breathless but smirking "but it is definitely happening again."

Hiccup chuckled, stripping out of his own clothes and joining her on the bed once naked. Her bare skin pressed to his own, hungry mouth kissing him. Definitely trumped phone sex.

-HTTYD-

I like the last bit much more than the actual phone sex... but I did warn you.