Push the limits with Isabella

You look down at the mess you and Emma have made Isabella. That sputtering, panting mess was once your girlfriend's hotter best friend, and now you and your girlfriend have ravaged her body...and made her enjoy it. You start thinking who your next target will be when Emma turns back to look at you with a grin. "Hey... I know you want to figure out ways to take out more of my friends, but I have a better idea first," she winks.

"You can use me to get to all of my friends that you want, my love," she twirls. "However, don't you think you should see what the limits of this **** are? I think we have our first test dummy." You glance down and notice that Emma has begun rubbing herself at the mere prospect of pushing her best friend to obey every command she's given without question. You have to admit, while going after your girlfriend's friends would be amazing, it would be even hotter to see just how much the Slave4U will take over Isabella. Your cock agrees, and you can feel your pants get tighter around your groin as you unintentionally get hard.

Emma notices what's going on in your pants and gives you a helping hand while telling you what she thinks the proper steps for completely breaking Isabella should be.

"First, we need to get her to hurt herself. It doesn't matter how severe- it can just be a slap if you want it to be. All that matters is we detach her obedience from her willpower. "

She strokes you off like an expert. It's hard to concentrate on her words.

"Then, we should probably give her a system for rewarding her that is based on her current conditions. We need to establish that her current state- recently-fucked, cum-covered, and sprawled on her cold concrete floor- is her baseline."

She suddenly grips your cock a little harder and you elicit a small moan. She smirks and keeps going.

"Once that's established, we can begin 'rewarding' her by...not tying her up, or not hitting her as hard while we use her, or more. You get the idea."

She places her mouth right by the tip of your cock. She seems to be teasing you with her tongue, but you're lost in pleasure and can't tell if she is or not.

"Hopefully, that'll make Isabella want to be more obedient on her own while we don't have to sacrifice our current conditions. Oh, and...mmph...keep giv-nnngh...giving her...*slurp* the Slave4U every...*gulp* time we f-mnngh... feed her."

She finally gets you to shove your member into her mouth, cutting off her monologue and making the conversation much more fulfilling.

"Now, let's...mmph... wait...mmmpphggg... I did- *gluk* *glak* I...mmm...*slurp*...ffffmm...gghhh..mnn...mnaahh..."

You can't resist her perfectly obedient little throat. You fuck it rough and eventually cum in her mouth, where she swishes it around before swallowing it with a smile.

Sitting in your couch with your girlfriend-turned-obedience-robot, you start thinking how you want to execute her plan for making Isabella your own sex toy...