>Twilight closed her eyes and felt the shampoo wash away down her face, rubbing and lathering her mane.
>The sweet, signature smell of lavender that she always liked to cover herself with.
>The door opened.
>"Uh, in here!"
>The door didn't close again, though. In fact, Twilight could hear hoofsteps approaching.
>She tried to wash the water away from her eyes to see who it was, but it was too late.
>The shower curtain rolled along the rail, and a pony stepped in behind her.
>"Heya, Twilight!"
>"Starlight? Uh, what are you doing in here? I'm... kinda using the-"
>Her vision had cleared, and staring her right in the face was a long, hanging shaft.
>Twilight backed up against the wall, watching it sway between Starlight's legs.
>"Like it?"
>"Wh-wh-"
>Before she could properly react, Starlight reached up and forced a magic dampening ring onto Twilight's horn. 
>"I guess you don't read some of those really old spellbooks of yours. There are some REALLY weird spells in them."
>Starilght giggled and prodded the horsecock with her hoof, watching it twitch and stiffen slightly.
>"Are you insane? Do you have any idea what kind of after effects a spell like that c-"
>"Oh, Twilight. You're so neurotic. It's fine. Look at it!"
>Rearing up on her hind legs Starlight reached up to grab the shower rail, her hips thrusting outwards and her cock unseathing steadily.
>Twilight was trapped against the wall, eyeing up the flared tip that rested only an inch or two away from her face.
>"What's wrong? I know you probably haven't seen one of these in real life, but there's no need to be scared of it."
>"This isn't funny, Starlight."
>The dominating unicorn swayed her hips and watched as her erect member bounced just against Twilight's face.
>"Go on, give it a kiss."
>"What do you think you-"
>"I said kiss it."
>Starilght's voice was stern and unflinching; Twilight hadn't heard her speak this way for a long time, but she could see there was really nothing she could do.
>Her trembling lips puckered and inched forward, planting a kiss right against the tip of Starlight's cock.
>The unicorn took this chance to grab Twilight by the back of her head and thrust it forward, her cheeks ballooning as her mouth and throat were filled with Starlight's newly-acquired stallionhood.
>"Mmh!"
>Her throat tightened in protest around Starlight's still-growing cock, tears pooling in her eyes as Starlight pulled it out, a strand of saliva hanging behind.
>"That shut you up." She tittered, pulling back and watching Twilight try to recoup.
>"How about you let me try the real thing?"
>"Wh-what?"
>"I wanna try this baby out. Put it through its paces, and there's one way I'm gonna do that."
>"Starlight, what's gotten into you?"
>"Less talking and more spreading."
>Starlight allowed Twilight to stand, legs shaking, and turn, reluctantly letting her tail fall to one side and reaching back to spread her cheek, offering up her pussy for Starlight to use and abuse.
>"Do you have any idea what will happen to you for doing this?"
>"God, you talk too much, Twilight! Maybe that's why you've never experienced this before.."
>With no words of warning she thrust forward, her marecock splitting Twilight's lips mercilessly and forcing itself inside, the resistance that was there was quickly overwhelmed.
>Twilight screamed, shuddering helplessly as the huge black rod pumped out and then back in, slamming into her hips and sending a wave of momentum rocking through her body.
>She gasped, teary-eyed, and took all of Starlight's length. It was all she could do.
>"Wow, Twilight! I knew you'd be pretty... ugh... tight, but try not to choke my cock."
>The sound of Starlight's laughter was merely background noise to Twilight; front and foremost was the pain she endured with every single thrust.
>Her marecunt instinctively moistened but it wasn't enough to lubricate the sheer force of Starlight's appendage.
>"Hnnh... hold on... this thing doesn't last long. I feel like I'm already gonna.."
>She removed her cock from Twilight's pussy just in time for it to spew forth several thick, stringy ropes of cum, landing over Twilight's back and dripping down over her ass.
>"Hey, not bad!"
>Twilight slowly looked over her shoulder, her expression was completely dead; all her energy and will to fight back had been sapped.
>"Open wide!"
>A second round of cum shot forward with impressive force, splattering Twilight's face and partly landing on her tongue.
>The alicorn barely reacted. The pain that was raw in her body was too much. She could barely even speak.
>"Thanks, Twilight! I knew I could count on you to help me test this thing out! I think there are still a few kinks here and there, but it seems to work just fine! Wouldn't you agree?"
>The alicorn just continued to stare silently, one eye closed shut to stop any of the ejaculate from entering.