worlo asked: rwby magic ink. yang starts to write 'blake ass eater' on weiss but she jumps away before yang can finish leaving just 'blakes ass'. weiss then gets transformed into blakes butt.
Yang froze as Weiss rolled out of bed, suddenly waking up in the middle of her prank.
“Yang Xiao-Long! What exactly do you think you are doing!?” She demanded as she stood up, staring down at the blonde angrily.
Yang was still frozen in place, her marker held aloft as she tried to understand what was going to happen now. Hell, she was pretty sure she’d accidentally added something as Weiss threw herself out of bed, so…
“Were you writing on me?” Weiss accused, walking toward the other side of the room, as if she had to get away from Yang, lest the blonde lunge at her to finish whatever she’d started.
Which she might’ve, to be perfectly honest, because she still didn’t know what was about to happen. “W-Wait Weiss, I need to check-”
“No- You won’t be checking anything, Xiao-Long.” Weiss hissed, still backing away from the blonde, only to nearly stumble as the back of her knees hit the edge of Blake’s bed, making the girl stumble, and fall into it, making Blake grumble something unintelligible, before turning around in her sleep to face the wall. Thankfully, she didn’t wake up, or Yang might have two problems on her hands.
Weiss crossed her arms with a huff. “Honestly, you can be so childish.” She chided, even as she climbed further into Blake’s bed? She was shuffling backward and pressing herself against Blake’s body, making the black-haired girl moan softly.
“I mean, seriously, writing on someone while they’re sleeping? I thought Ruby was supposed to be the younger sister here, not you?” Weiss continues as Yang stared stupidly at Weiss as she somehow continues to shuffle backward- but no.
Weiss wasn’t actually moving. She was being dragged backward, and Yang’s mouth fell open as Weiss began bending forward, revealing that she was slowly sinking ass first into Blake’s own ass, making the Faunus let out a pleasured moan, even as Weiss remained unaware of what was happening, continuing to tell Yang off as she sunk further and further into Blake’s body.
And Blake’s ass grew with every inch Weiss lost, until the Bellabooty was twice, if not thrice, the size it previously was.
“Honestly, the fact that you would try to prank an ass of all things is ridiculous.” Were Weiss’ last words, before Blake’s ass finished swallowing up the bratty heiress, leaving Yang to stare at her girlfriend’s gigantic ass.
Of Weiss, no trace remained, except for all the phat she added to Blake’s dump truck.
Well, this isn’t what she’d planned, but Yang hoped Blake would appreciate her birthday present all the same. She knew she would enjoy it, if nothing else~