She'll wake Emily up, but only after playing with her mind a little first

The words were on Lily's lips to tell Emily to look away, to end this trance. But they didn't come, not yet. Her brain was far too horny for that, and the sight of her girlfriend kneeling and staring at her new perfect ass, as though worshiping it, put some ideas in her head.

It feels so good when my ass gets touched, especially by her, she thought. It's so sensitive now, I bet I could cum just from that. Honestly, it's almost like... like Emily's more focused on my ass than me. Why is that turning me on so much?

An idea came to her from that train of thought, and it was too kinky not to play with. "Emily, Lily isn't your girlfriend anymore, her ass is. This ass is so perfect you want to worship and please it, you want to date it. In comparison, Lily is just... what the ass is attached to. Even when you wake up from your trance, that will still be true."

There was a flicker of something like resistance on Emily's face when she heard that, but it didn't stop her from repeating back, "Lily...isn't my girlfriend...her ass is...worship ass...please ass..." Emily shuddered as she said it, the brief forewarning of pushback against the concept truly gone, overrun by the empty headed trance the ass caused in her.

Hearing that repeated back awoke such feelings in Lily. The deep seated need to have her ass pleasured was clearly about to come true, but... why did she do it in a way that stopped Emily from being her girlfriend? Because it's hot. Fuck, the idea my ass is too good compared to me, that she has to date it instead, I might be able to cum just thinking about it... It played on her insecurities, but it was also too kinky not to play with at least a little. Besides, I can... I can always undo it later.

Before she could think again and undo it, Lily reached back and forcefully stopped the jiggle of her ass cheeks, and telling Emily as she did, "Let them stop. They can stop now."

Her girlfriend had already started to reach forward to do as she'd previously been commanded, but with that order dropped her hands just froze here. Lily watched as the life returned to her eyes, but the didn't leave her ass. "W-whoa, that's weird... how'd I get here babe?"

"Oh, um... you woke up and saw what happened to my ass. It's so big now! I guess my wish from last night came true. And then you just kind of walked over here and knelt down in front of it." Lily's heart was racing. Did the mental change she'd implanted work?

"I wasn't..." Emily frowned, then shook her head. "Whoa, that was weird. I almost said I wasn't asking you... but obviously I was, right?" She took a big breath in through her nose, eyes still on the perky ass right before her face. "Oh... that's why. Lily, I'm sorry. I don't think I can date you anymore. I want to date your ass instead."

If Lily wasn't so fucking turned on already, she would have laughed at the idea. Instead, hearing it sent a shock of fear and thrill through her. As her little cock twitched, she bit her lip, and replied, "Y-yeah? I mean... if you want to, go ahead. My ass won't say no, especially when it looks like you're worshiping it." My new ass deserves worship. It might even deserve a girlfriend more than I do. B-besides, I have another one. My ass can have Emily, just for a little while.

Hearing that, Emily beamed in happiness. "Oh Lily, thank you! I can't tell you how happy this makes me. You're still a good friend, and a great roommate, but compared to your ass, I don't know how long I could have stood pretending it was you I still wanted." The words hurt to hear, but in a way that turned Lily on even more. Smiling at Lily's ass, Emily purred, "Well, since we already know each other so well, I guess we don't have to wait for the third date, right babe?"