All characters are over the age of 18.
Warning: The latter half of this story contains Fart/Scat material and toilet domination.
Siblings Are a Handful
"Geez, men are the worst!!"
A gym bag slammed unto the cushion near where you were sitting on the couch. You were left completely dumbfounded by the sudden exclamation that startled you and almost caused you to spill some of your "breakfast" onto the living room floor.
There stood your "sister", a large Bovine anthro with caramel brown fur and fiery red hair. It seemed that she just got home from practice but was for some reason in a foul mood. Her deep brown nostrils were flared as her bountiful chest heaved slightly. There was an obvious pout on her cow face and her brows were furrowed as if she were a child throwing a tantrum.
As you looked at her, baring her dissatisfaction for the world to see, she was also looking at you as you sat frozen on the couch. Her eyes that were brimming with mirth slowly started undertaking a different colour as she looked at what you were doing, holding in your hands a large, bloated condom packed full of a viscous, white liquid. The cloudy goo leaked from your lips as you were made to suddenly pull away from the large slushie straw that you'd been using to slurp up the "breakfast" your "mommy" had left you before going to work.
As you noticed where her gaze landed, as well as the rising tent in your sister's gym shorts, you started having a bad premonition that came to fruition with the oh so familiar words that the Bovine said next.
"You know...why can't all men be like you, bro?"
Goddamn it, not this again! What was it, the fifth time this month? How many failed relationships did she have to go through before she realised what the problem was?
Of course, these were thoughts you would never voice out loud, being the loving "brother" you were, you naturally wouldn't want to see your sister unhappy.
"...Let's talk in my room."
Of course, things would develop in this direction. Knowing what was coming next, you quickly tie the opening of the condom to save your "meal" for later and manage to lay it on the couch right before your wrist was grabbed with an absurd amount of strength. Naturally you put up no resistance as you were dragged by your sister off to her room.
The room that you both entered was a strange mix of feminine and tomboyish. There were cute furnishings along with sports magazines as well as one or two volleyball trophies displayed on the shelves.
Before you could even appreciate the slight musky smell that didn't suite a girl's room, you were dragged forward and casually tossed onto the bed like a sack of clothes. Naturally, you didn't mind the rough treatment and simply lay patiently in the position she put you, laying on your side, horizontally along the large anthro-sized bed.
In the meantime, your "sister" was busy throwing of her gym wear, directly stripping herself nude and casually tossing her used garments in random corners of the room. The sight that entered your eyes was mesmerising. Her body covered in sleek brown fur was plump and curvy in all the right places while being tight and well-toned as a result of her sporty nature. Her large bovine butt was especially captivating as her tail swung from cheek to cheek. Then she turned around and...wow.
Everything about your sister was a stark resemblance to your "mom", from the curve of her ivory horns to the sheen of her beautiful brown coat, all the way down to the size and voracity of her monstrous bovine cock! The beastly phallus stood in an upright posture as thick, pulsating veins adorned the engorged flesh that twitched and spasmed in anticipation. Already there was a stream of pre leaking from the flared head of the Cow's cock, staining the carpet laid out on the bedroom floor. Your sis' member was so excited that you felt like you could feel the heat from where you were laying down.
What was definitely real was the thick stench of musk that wafted over to you and ruthlessly invaded your nostrils, a stench that only grew more potent as your sister eagerly hopped onto the bed and got into position, laying lengthways with her lower body lined up to greet your face. Butterflies fluttered in your stomach as you stared right at the twitching head of your sister's cock. You remained as you were while she grabbed her phone off the pillow she laid her head on and began tapping away at it furiously.
Seconds ticked by with her cockhead pulsing barely an inch from your face before her call connected and you heard her start speaking to someone you assumed to be her best friend.
"Yeah, we broke up...I know right, I knew that guy was no good, he couldn't even fit the head in his mouth! You should've heard him whining, talking about how much his jaw hurt!"
As soon as the conversation began, the head of your sister's dick instantly closed the distance to your face and rammed at your closed mouth with enough force to slightly push your body across the mattress! Your mouth was instantly pried open by the collision and within a moment's time, the slimy, salty precum dripping head of your sister's Bovine cock was wedged inside your mouth in its entirety!
Your sister brought you into her room to "talk" only to end up calling her best friend instead. It made sense though when you thought about it, how would you be able to hold a conversation when your mouth was fully occupied doing something else?!
Your eyes already began to water but your sister certainly didn't stop there!
GLLLRRRKKK!!
Without wasting any time, she scooted towards you, bringing her furry pelvis closer to your face while slowly but surely planting more and more of her girthy member into your face. The harsh gag that came from her cock breaking into the confines of your throat made her shudder.
"Ugh, y-yeah, so I asked him if he's ever sucked cock before...yeah, that's what he told me, but she obviously doesn't count, hers is almost as small as a human's! Oof, no offence bro."