A lazy winter afternoon ticked by. The weak winter sun lazily found its way into a room shared by two kids. Each photon found itself jostled and oscillated by the sounds of Alicia Aleesha expressing just how much she desires the listener in song.

In the floor, next to the bed, a yong puppy and a calf were both looking at a chessboard, populated with fewer chess pieces than there had been at the start. Black outnumbered white, and the dog was certainly in a pickle about it.

"Mate in three, big brother," the calf teased. "I thought you got better at this the more you played."

The dog looked at the situation. He felt that if he were a better player, he could see all the threatening and safe squares all hilighted in red and blue in his mind's eye. All he could see was plastic pieces on a rubber mat, and he wished he could apply what he read in books to the scene before him.

"I'm in the corner waiting, come show me what I'm waiting for," Alicia Aleesha passionately intoned to nobody in particular from the stereo.

A swift L shaped move put the knight in position. "Check," the puppy boy said.

With a swift clack, a bishop put an end to the knight's insolence. Another bishop was quick to avenge its fallen horse brother.

"Feeling the pressure from you, can't wait one second more..."

The calf giggled. "Useless, Rob, useless!" She moved the queen in from the corner it'd been inhabiting. it threatened a pawn directly in front of white's king. It was all over...

"Feeling the tower of your passion, baby..."

Suddenly, in a frightening moment of clarity, Robert saw it. A white rook took out a black pawn in front of the black king.

"Check... yes, checkmate."

The calf looked in unbelief at the situation. Sure enough, there was nothing she could do. No move would do it.

"You did it!" she broke out in a big smile and started laughing. "That's the first time you've ever won at this!"

Rob looked at his sister expectantly, his tail wagging.

"Ok, ok, but you get ten minutes. That's it." 

Rob jumped right over the board, scattering the pieces every which way on the way to his sister.
 
"Ah! Don't get so excited, you big dummy!" she yelped.

"I can't help it, Sigrid, you get me so excited I can't help myself." Rob replied. It was true. His excitement was increasingly outlined in his jeans. His paws pulled the calf into a hug, and then the both of them flipped up onto the bed.

Sigrid found her warm pants suddenly sliding off, and her cute pink underwear quickly followe it around her ankles. Her legs were pushed up, and between them popped up the head of her big brother, licking his chops, his dog tongue enticing in how long it was.

Without a word, Rob started licking at Sigrid's slit, every low moan making him more excited. His tongue first just stayed around the outside, but soon, once it started to swell and moisten from excitement, he couldn't resist anymore, tasting his sister's sweet walls with its entire length.

"Whoooa~ hfffff, d-don't forget, Big Brother, youuuuuu've got eight minnnnnnhhhh~" Sigrid tried to say, but the dog tongue breaching her innermost cow depth was slowly boiling away all the thoughts in her head, making it harder and harder to form words. She could feel the tip of his tongue circling the outside of her cervix, driving her insane.

And just as suddenly as it had started, it stopped. When Sigrid looked up to see what was going on, she saw Rob pulling off his pants, and his fully hard cock was already twitching.

"Whoa, already!?" Sigrid got up, frantically trying to make it to the nightstand, but before she could get the drawer open she felt the strong arms of her brother around her, felt the hard doggy cock sliding against her pussy.

"Nnnhh stop stop wait WAIT!" Sigrid shouted, "Not without a condom! Mom said! LISTEN you horny idiot!"

Robert snapped out of it long enough to open the top drawer of the nightstand for her. There were many things inside it handy to have next to the bed, but unfortunately, a condom was not among them.

"Awww, did we already run out?" Sigrid sighed, and then yelped when she felt her brother's cock rub against her slit again.

"We can still do it safe, Little Sis. Do you wanna do it back there?"

There was nothing for it. "Mmmhhhhh fine. But only because I want it too. I had *better* be able to sit down after this."

Robert's cock, slathered in his sister's pussy juice, made its way down, the tip pressing against her cute little anus. Sigrid felt it push, slowly, slowly, then suddenly all the way into her.

She panted as she got used to the size of her brother again. It'd been a while since she'd taken him back there, and she could handle it so long as he didn't suddenly-

THUMP. THUMP. THUMP.

Without warning, Robert started to move, hilting himself into her with each thrust. Words and thoughts were swiftly driven out of both of them with each one. Sigrid's arms went limp over the edge of the bed, where she was lost in the haze of cock until her hand brushed against the white king that had been scattered across the room. 

She picked it up, feeling the smooth lines. This was the right girth.

"Hfffh, roll over, Big Brother," Sigrid got out. She felt herself pulled along as he rolled onto his back, animal brain leaping into the gap the higher functions had taken a vacation from. The calf felt the warmth of her brother directly against her back, while his cock was still giving her no mercy. It just wasn't enough, though...

Sigrid took the king piece and started rubbing it against her wet cunny, which was begging to receive something, anything phallic. The plastic simulation of wood turning pressed against her below, and, carefully gripping the base, she slid it in.

The new burst of sensation made her start moaning anew, which promted more vigorous pumping from her insatiable canine sibling. She felt his hands move, getting up under her sweater, groping her flat chest and tugging her nipples as his thrusts shifted more for depth than speed.

Sigrid's pussy, meanwhile, greedily closed around the king piece, the ridges scraping the walls. It wasn't much, but it was just enough. Her pussy needed this.

Five minutes remained.

The chess piece slid in and out, Sigrid fucking herself with it while her rear reapeatedly reamed. She could feel herself getting right on the edge, just needing one more thing to push herself over the edge. Almost, just...

At that point, Robert gently bit Sigrid's shoulder, his hot breath blowing down Sigrid's chest.

That was enough.

Sigrid squealed as her orgasm hit. The king piece shot clear across the room, followed by powerful squirts of pussy juice as the calf about lost all muscle control.

For a long while, Sigrid's mind was nothing but a white fog, blown clear by pleasure. But then she felt the change of what was hitting her below. She knew that tapping. That was the tapping of a knot forming.

Sigrid slapped her hands against her brother's body, and when that didn't bring any response, they became closed fists. Eventually, she resorted to pinching her brother's neck right in the nerve.

Robert yelped in pain. "Ow! What was that for!?"

"S-stop before you knot me, you dummy!" Sigrid finally got out.

"Oh, right! Sorry! I'm just so close"

"Then come here and I'll let you finish that way you really like," she said, pulling carefully off his cock and kneeling down next to the bed, removing her sweater. She knelt there topless, her hands ready to catch anything that missed its mark.

"Come on, Rob~", she moaned teasingly, "cum all over your little sister." She closed her eyes, opened her mouth, and waited.

This was too much for Robert. It didn't take many strokes at all to bring himself to climax. The first squirt of his hot dog semen went right onto Sigrid's tongue. She closed her mouth around it, savoring the taste while the second stream went all over her face. The third and fourth bursts plastered themselves all over her delightful flat chest.

Sigrid then got up and kissed her brother, sharing the taste of his semen with him.

"Now clean me off, Big Brother, we gotta go get some more condoms."

He didn't need to be asked twice. He started lapping at his sister's face, making her giggle gleefully. From face to neck to her chest, Robert licked up all of the mess he made, and enjoyed every moment. When he was done, she licked off his crotch and cock, and after a while, they were both done.

After a quick detour to the bathroom to finish actually cleaning off, the two hurried downstairs, only looking slightly disheveled. On their way to the front door, they passed by a bountifully shaped buffalo with an eye obscuring pink afro. "You kids off somewhere?" she asked brusquely.

"We're going shopping, Mama. We ran out of something." Robert said. "Sis is tagging along."

Bessie Bluff, for that was her name, shrugged. "Alright. Stay safe and come right back, alright? Your mom'll be back with supper in a couple hours."

The two ran off, and Bessie went upstairs, her nose detecting what had just gone down.

In their room, despite their best evidence, too much evidence had been left. By the door was the king, coated in Sigrid's juices still. Bessie picked it up, sniffing it, then licking it.

"Jeez, kids, do you have to make such a mess?" she thought to herself as she looked around. Wet spots on the bed. Wet spots beside the bed. She knelt down and sampled some of the latter. It was the unmistakeable taste of her son's cum.

She found herself putting pictures to all the noises she'd heard and found herself starting to heat up.

She quickly left their room and went back downstairs. Gentleman Powerbuzz was waiting in her own bedroom. She had the time before Maja got back...