I won't lie, this is not a chapter with any real development. I just needed some Valcup and this one already has the backstory done.
-HTTYD-
Hiccup chewed his toast, struggling to swallow with such a dry mouth. His mother had that effect on him, more so than ever lately as her belly continued to swell. It wasn't much longer he had to wait, though it was a painful wait all the same as he watched his father fawn over her, convinced the baby growing within his wife was his own. Though Stoick had been fearing his wife was having an affair, it seemed the possibility of being cuckolded by his own son had never crossed his mind.
The door had barely closed behind him before Hiccup's hands were on her belly, his mother's sweet laughter in his ear as she giggled at his eagerness. They always waited a few minutes before retiring to bed (or before he undressed her and had her there in the kitchen, depending on the mood they were in), as Stoick often forgot things. But the allotted time passed, and Hiccup felt much better by then anyway as he felt the little kicks and wriggles under his hands.
"Active this morning?"
"Mhmm. Just like you were. Small but strong. Though this one is bigger than you were."
Hiccup had only been able to go to one of the scans for her pregnancy, because he refused to go with his own father there, but it had been a magical moment. Under guise of concern about another premature delivery, Valka had requested a few tests for the babe's health (she hadn't mentioned that the child was product of mother and son) and so they had assurances that their child was healthy despite that close relation.
"Good. Maybe they'll stay in the whole time too. Stay put little one."
Hiccup murmured to her swollen belly, reluctantly taking his hands away from the swell to gesture to the door. Valka nodded in agreement, and the two headed to Hiccup's bedroom. They both undressed down to boxers and briefs respectively and laid down, Hiccup spooned up against his mother's back so their joined hands could rest over her belly. The position meant his face was pressed into her hair, which Hiccup was perfectly happy with; he'd loved her hair since he was a boy, long and soft and a beautiful colour. Even as sprinkles of silver began to make their way in, Hiccup adored it just the same.
In her forties and well into the second trimester of her pregnancy, his mother indulged herself in a nap. Hiccup was perfectly happy to lay next to her, resting and half-dozing himself as he listened to her steady breathing and felt the baby move under their hands occasionally.
When she stirred from her rest, Valka rolled over onto her other side, dislodging Hiccup's hand from her belly but bringing her bare body into view. Her belly wasn't all that had grown, and Hiccup was almost as taken by her breasts, swelling slowly in preparation to feed their child. Bump pressed against his own lean stomach, Valka leant in until the two could kiss, Hiccup's fingers slowly roaming her bare skin, fingertips trailing up her side with just enough pressure to make her gasp into his mouth. When his touch became a little more purposeful, hand closing over one sensitive breast, his mother laughed lightly against his lips before pulling back.
"You're insatiable."
"Not my fault you're irresistible."
He couldn't keep his hands off her before she was pregnant, what on earth made his mother think Hiccup was going to lose interest when she was with child? If she'd ever feared Hiccup was going to lose interest as she got bigger, he was quite sure he'd put those concerns to rest very quickly. His cock swelled against his thigh, rising to brush the underside of her belly bump as the two edged closer together. Her hand slipped into his hair, breathing the words "I love you, my son" in between greedy kisses.
"Are you up to this?"
Hiccup knew sometimes she was tired, and sometimes she was too sore, but when he asked she nodded keenly, urging Hiccup on to his back and climbing up on top of him. It seemed she was the insatiable one then, tugging his boxers down just enough and pushing hers to the side, giving his cock a few tugs to ensure he was hard enough before guiding him into place. Hiccup groaned as he felt how wet she was already, though they'd barely even started (a rise in libido had transpired to be a rather delightful side effect of pregnancy hormones to contrast the less pleasant ones), and he slipped inside her without resistance.
"Oh gods... fuck, you feel good mom."
She hummed happily, rocking a few times to savour the feel of him. Hiccup let his eyes drag over her otherwise bare form, a body he knew so well he could probably draw a map of her freckles from memory. It took little time for her to start up a steady rhythm, and Hiccup wasn't sure where to look; the way her face displayed her pleasure was utterly beautiful, no matter how many times he had seen it, but the rise and fall of her changing body was equally enthralling. Valka leant back to change the angle his cock hit the sensitive spots inside her, and the position pushed her chest and belly out more, making the decision about where Hiccup was watching for him.
Increasingly incoherent praise spilled from his lips as she rode him, addicted to his mother and ecstatic that she felt the same. She shifted positions again, leaning forward and bracing her hands against his chest. Hiccup finally dragged his eyes up to her face, seeing the flush on her cheeks and the hairs sticking to her sweaty forehead, bottom lip swollen where she'd worried at it with her teeth. Her own eyes were closed, focused as she was on chasing her pleasure. The slick, hot grip of her clenching around his cock was slowly driving Hiccup to madness; he was perfectly sure that no matter how many times he experienced it, the rush of being inside his mother would never fade.
It was quick and messy, no slow savouring once Valka got moving, and soon enough she was quivering and moaning atop him, the word son never sounding more filthy than it did when Valka mewled it as she climaxed. She squirmed a little as her orgasm faded, rocking her hips a few times to encourage Hiccup. He shook his head and had her move, laying her down on her back and kneeling over her. Cock still wet with her, Hiccup gripped his erection and stroked, his free hand splayed over her belly. It didn't take long for him to come, thick white stripes splattering across her bare torso, covering her from collarbone to navel. The visual alone probably would have made Hiccup come if he hadn't already, the erotic image of her pregnant and covered in him indecently arousing to Hiccup and his cock gave a last few twitches of interest before starting to soften.
"Filthy boy."
Valka sighed, but Hiccup caught her smirk and chuckled to himself, watching a few dribbles of come drip down her bump.
"You like it and we both know it. And it's not like I do it all the time. If I did, you probably wouldn't be knocked up now."
His mother rolled her eyes, stretching luxuriously before shifting and tugging at the waistband of her underwear. It had gotten a little twisted up by their movements, so Hiccup helped her out of said underwear and tossed the fabric aside, breathing in her scent and shuddering in pleasure at the heady musk. He spread her legs wider and dropped a kiss to her sticky inner thigh, lifting his head just long enough to meet her gaze, smirking.
"Now you've had your wicked way with me, it's my turn."
-HTTYD-
Like I said, just needed some Valcup. I hope this was fun for someone!