Jay sagged into bed.
It was still early but he wanted to try and get some decent sleep.
He'd bought some sleeping tablets to try and help him sleep better, the combined stress/nerves and excitement of going to university soon was taking a toll on him, this was the first time he'd be living away from home properly and mostly independent with all new people and places too.

Reading the instructions for what felt like the hundredth time he popped two of the white chalky tablets out their blister and balanced them on his tongue, chugging down a large glass of water to help swallow them.
He couldn't help but shudder at the awful taste and texture.

Melody snuffled awake, only half aware in the early hours.
The summer sun hadn't even begun to rise yet.

Hardly awake or aware she could just about make out her brother shuffling towards her.

"Is too early" she murmured, rolling over. Sometimes her brother would sneak in for a quicky, but he'd said he was trying out some sleeping tablets, so she doubted it was that.

She was just dozing off when she felt a warm spray hit her face.
Blinking awake quite quickly this time she sputtered as the torrent splashed over her muzzle and nose.

She could just about taste it, and definitely smell it.
It was piss!
Her brother was pissing on her!

He'd done it plenty of times before, but never when she was in bed, and definitely not when she was asleep.

"Dude, pfff, fuck, what the hell" she sputtered, still groggy from the rude awakening

The response was a nonsense murmur as of a zombie.

He didn't seem to be slowing.

Without any better idea, and to save her bed getting utterly ruined by her brother's tasteless joke, she opened her muzzle wide, trying to catch her brother's stream as she got into a better position.
She did a pretty good job of making sure only her face, muzzle and chest were hit before she managed to wrap her lips around his pointed tip.
He let out another unintelligible mumble, his cock starting to swell as his flow started to lessen.

"This is a crap joke, if you've ruined my bed mum and dad will be furious." She managed around his cock as he finished pissing.

Unfortunately he wasn't done, he mumbled again.

"Are you even awake? Fuck, you're not are you?"
He mumbled again. She'd slept with him enough to know when he wasn't actually awake when responding.
This was new.
Maybe he could normally make his way to the bathroom without actually waking up normally and these tablets had just messed up his normal pathing. She had no idea honestly, she couldn't think of him not being awake when he got up to use the loo when they slept together.

"If this is some somnambulism shit I'm cuffing you to your bed and giving you a nappy. This is...!"
She was cut off as he pushed forward, slumping over her as if climbing back into his own bed.
His crotch and now hardening shaft were firmly pressing against her face as he sprawled awkwardly atop his sister.

The younger collie girl was pinned such she couldn't easily use her arms or legs, being partly wrapped in her bedding didn't help her situation either.

Opening her mouth to help her yelp it was instead filled with several inches of solid collie cock.

Reacting to the stimulation of a warm wet orifice around his cock he started hump forward, fuzzy ball sack dragging on his sister's chin.

She choked and gagged a bit, breathing with her brother dead weight on her wasn't easy, especially with his cock lodged in her mouth.
No matter how much she liked giving head, having a sleeping person lie atop her and hump her face was not much fun. Mostly as she was in an uncomfortable position with her brother flopped atop her.

She mentally cursed her weak nerdy body and inability to bite down. If he wasn't her brother, who she loved, and it wasn't his cock, she'd have just bitten down, which was her usual line of defence; cousin Kenny and a few other boys had learned that the hard way. Thankfully the majority of those instances hadn't been on the cock but had been to protect herself (and/or another) from sexual assault.
Biting her brother's cock off seemed a bad idea. She knew there were a lot of big veins, arteries and blood vessels in and around the cock, so bites and cuts could bleed a lot and be fatal. Plus there was the baculum, which she didn't want to break just in case if further broke his cock and rendered it utterly useless.
She could probably get forgiven for a bit of a nip but breaking his dick... She'd probably lose visitation rights to it.

So she did what she could to make him cum fast and maybe roll off, or at least soften up so she could bite him somewhere less dangerous.

Her tongue thrashed and slathered his cock, tasting every square inch it could reach.
Her lips curled over her fangs to try and not scratch the precious cock in her muzzle, the awkward angle and fact he was basically mashing her head into the soft mattress and his hips into her face. The part which was always elsewhere, thinking about thinking of just thinking something else, observed that she should probably get a new mattress as this was as old as she was, and no mattress should have such an uneven distribution of soft spots that a guy lying on her face would press her quite so deep.
The other parts were busy trying to not suffocate between her brother cock in her throat and his furry crotch in her nose, trying to not bite him and complaining about how uncomfortable she was, her tail was getting pins and needles from how everything was arranged.

Above her he grunted and moaned, starting to pick up the pace a little, his cock throbbing and knot trying to swell and tie.
She'd have reached up to simulate a tie with her hand, or if he were awake he would. Given the current circumstances neither was practical or possible, she tried to think of anything other than having him tie her muzzle, when he made the decision for her.
With a hard thrust he shoved in, his knot expanding rapidly he bucked a couple of times letting out a soft whine as he started to cum.
She choked and gagged as his full weight settled on his hips, his dick driving deep into her throat and knot forcing her small mouth wide, potent collie cum shot directly down her throat.
Fortunately for her it seemed her brother's wet dreams finale, even if aided by her face, were not nearly as powerful or copious as his waking orgasms. He seemed to only fill her face and tie for a couple of minutes. Although to her pinned as she was and having difficulty breathing they seemed to last substantially longer.

She didn't mind free use but this was a complete novelty, to be sleep face fucked by her somnambulist big brother...
She wondered if she could get him to just normally fuck her.
It would make up for all the sex they'd miss out on when he went to university. Well, he'd probably get plenty, but she just had their mother, father, and her best friend (although noone else knew they fucked) for regular servicing.
Plus, he was her first dick.

Thinking back on it, this was a weird payback given the first they'd fucked she'd taken him while he was asleep, this time her was taking her while he was asleep.

He finally softened enough to start to retreat into his sheath, before she could sink her teeth into is tender stomach the larger collie man rolled off his pup sisters face, practically falling off the bed in the process.
With a gentle shove from jer he flopped onto the floor, seemingly still asleep, with a loud snort, and she got her bed back (even if it did have a large indentation which wasn't properly returning to shape now).

She considered going to the bathroom to wash the dry piss off her face and muzzle, but decided to get revenge by sleeping in his bed, getting his piss partly on his bedding, and let him stay on the floor.

She looked forward to the morning and his confusion at having his sheath out on the floor of his sisters room.