Disclaimer: I do not own Wynonna Earp. I do not make any money from the writing of this story.
*****
"Honey, I'm home." Bad Wynonna announced with a giggle as she entered 'her sister's room' to find her pray still tied to the bed.
"That was fast." Waverly grumbled.
"Yeah, I brushed off the cowboy with the impressive moustache by telling him I was sick, which is technically true, so I could come back so we can have more fun. I even got you a present. Wanna see?" Bad Wynonna teased, producing her gift from behind her back, and then cackling evilly, "Do ya like it?"
Waverly gulped as she stared at the big toy, and then questioned, "You're gonna let Wynonna use that thing on me, right?"
"Do you want her too?" Bad Wynonna grinned.
"You know I do." Waverly said softly, before clarifying, "Please let Wynonna fuck me with a cock. I want my big sister to fuck me with a cock."
"Slut." Bad Wynonna taunted, before purring with delight as she slowly approached, "But don't worry Waves, as long as you both play nice, you'll get exactly what you both want. We all will. Now stay still. I just need to get you into position first, and then the real fun can begin."
*
When Wynonna awoke again from the mind control the first thing she was aware of was a beautiful little naked butt in front of her. A clearly female butt. Waverly's butt. Oh God, her precious baby girl was bent over in front of her, and Wynonna's hands were on her butt.
More accurately Waverly's hands were still tied to the bed, but she had been flipped over with the lower half of her body hanging off the bed and she was looking back nervously at Wynonna, who was naked except for the giant cock protruding from her groin. A big strap-on cock, making it pretty clear what the evil Demon wanted her to do now, and Wynonna just wasn't strong enough to refuse it.
"Baby girl, are you okay?" Wynonna asked softly and apologetically.
"I'm fine. It wants you to spank me." Waverly gulped, before clarifying, "I want you to spank me?"
Wynonna bit her lip, then asked, "Why?"
"Because I've been naughty." Waverly replied just as she was told too, although she truly believed the words, "I've let other people touch what's rightfully yours. I've give in nearly all my virginities away to men, and a woman. I've even denied you my body out of sheer cowardice, when we could have been together all this time. And we could have been enough. We should have been."
"That was my fault too baby girl." Wynonna softly reminded her sister.
"Yes, but I'm a slutty little bottom, and you're a strong, powerful top. It's only right that you punish me for it. And I want that. I want that so bad." Waverly begged, "Please Wynonna, spank me! I wanna be spanked."
As Waverly continued to beg Wynonna lazily groped her little sister's beautiful little butt, squeezing and pinching it every so often like a butcher inspecting a piece of meat, making Waverly whimper between her words. Not that Wynonna was really paying attention to them anymore.
No, she was far too focused on playing with that cute little backside and savouring once again getting something she secretly always wanted. After all, Waverly did have the cutest little rump Wynonna had ever seen, and no matter how hard she tried Wynonna just couldn't stop thinking about doing wonderfully wicked things to it, and now for better or for worse she would have the chance.
The first strike was sudden and hard, making Waverly cry out shamelessly and then whimper. She did the same for the next few strikes, however they were nowhere near as hard as Wynonna wanted to ease into it, and had simply wanted Waverly to stop talking and give this her full attention. Which Wynonna very much succeeded in doing. Okay, she also just couldn't resist dishing out that hard blow, especially given the satisfying sounds it made.
And not just Waverly's cries and whimpers, but the sound of flesh smacking off flesh, which she got to enjoy to a lesser extent throughout the spanking. And then not to a lesser extent when Wynonna inevitably picked up the pace and started to give her little sister a real spanking.
It was quite a long time before she reached that stage as Wynonna wanted to spank Waverly for as long as possible, mostly for her own selfish lust. But also she could feel how satisfied the creature inside her was with making the Earp sisters do this to each other, and enjoy it, and as long as that creature was satisfied Waverly wouldn't be hurt seriously.
Also, to Wynonna's delight, Waverly was enjoying this just as much as she was, which would have been obvious from the sounds of her cries alone, but in their current position Wynonna was getting a good view of her baby sister's pussy, meaning she could see just how wet it was. Fuck, her kid sister was wet from Wynonna spanking her. This was so hot. Especially as it proved they might just be perfect for each other.