Yes, her ass

You think about it for a moment, Brenda would do what you ask of her because she listens, she was your pet and you her master. And you remember why you put her in this position in the first place. Because you don't like her very much. She was amazing at giving oral pleasure, and yes that was making you dislike her less, however she hadn't earned forgiveness for all her bitchiness just yet.

You put a hand on Brenda's cheek and bend down. Your mouth almost touching her ear as you whisper "You wont mind having a large cock up your ass for me will you?" She gives a weak nod and reaches back with both hands, one hand grabs Nick's large cock while the other spreads her plump ass cheeks. "Wow, what are yo-" Nick can't even finish his sentence, and he doesn't need to. Brenda guides the tip of his cock to press against her anal sphincter. "You can use that hole instead" you say, with a slight smile. Nick smiles back, and as Brenda's saliva from the previous blowjob still drips off his cock he pushes it in, slowly and only the head first as Brenda grunts loudly. It seemed to be a mixture of slight pain and heavy pleasure, which was good. If it had been the other way around you would've felt very bad. Sure, you wanted Nick to put her in her place, but you didn't actually want to her her badly.

Luckily for you, after a short while of teasing, slowly pulling out and putting back in. Nick and Brenda had both reached a point where they were comfortable, and Nick now started fucking her sexy ass in earnest. "Oh- oh- oh- OH- oh- OH- OH!" with every trust Brenda let out a tiny yell of pleasure. Which was all well and good, but you had calmed down by now and were eager for her to resume her real task which was to service you. And so, you lifted your skirt and put a hand on her head to guide her back down. She gave you a disapproving look, but you didn't care. She got back to business, her tongue fully back to action as it pushed it's way back into your wet twat.

The added movement from Nick pounding her asshole also had an interesting effect on the oral she was giving. It made it a bit more akward, but also more pleasurable somehow. From your vantage point you could clearly see the long, spit-coated cock disappearing into Brenda's tight pucker in an rhythmical manner. His grunting along with the slapping sounds of the bodies before you hitting each other were actually kinda of a turn on, which in turn meant Brenda's difficulty pleasuring you due to her ass getting pounded hard wasn't having much effect on your overall pleasure. You were back to being on the edge much quicker than you anticipated.

"Hey Alice, could you show me?" Nick asked between grunts as he nodded towards Brenda's head. You are too far gone at this point and pull up your skirt all the way, bringing into view Brenda munching your box with great enthusiasm. "Wow damn, that's a beautiful sight!" Nick said as he smiled at you. You can't tell if you're blushing more because of him or because you're growing closer and closer to climax, but it was a nice feeling. And then something unexpected happened, Brenda suddenly slowed down her licking so much it seemed like she stopped completely. "Oh! OH!" Nick suddenly slowed down "She's really clamping down on me now!" You look down and you see Brenda shake violently, barely able to keep herself from falling over. The sight of her eyes rolling back into her skull and a bit of drool, mixed with your own juices dripping from her mouth pushes you over the edge yourself.

You shout "Oh my GOD!" as you throw your head back as your legs start to shake ever more violently than Brenda's, and then you start squirting, a short wide burst of juices directly onto Brenda's face and into her drooling mouth. You collapse on the toilet, trying your best to not slip off it. Brenda is back in the world of the living, but she's still shivering as Nick continues to roughly plow her behind. You yourself experience some pretty massive aftershocks.

Nick continues his hard pounding of Brenda's ass as he says "Wow, you two really creamed it huh." Brenda gives an annoyed grunt whereas you give a slight snort. "Yeah, I guess we... we did, didn't we?" you answer. "Then I guess- Ugh- that it's MY turn now!" he says, as he picks up the pace even more for a couple more second, followed by him slowing down but making the insertions even harder. "Take. my. cum!" he shouts, punctuating each word by ramming his cock into Brenda's anus all the way to the hilt. One final thrust and he holds his penis inside Brenda's behind, and you can see his balls twitching hard as he pumps his cum directly into her bowels.

Brenda and Nick stay in the same position for a while as they catch their breath while you do the same. And as all three of you come out of the lust filled situation Brenda is the first to speak up. "What the fuck Nick?! Who permitted you to cum in my ass?" And just as Nick tries to retort you interject "Brenda, I didn't tell him he couldn't, so he could. Right Nick?" Nick again raises his eyebrow, but he simply nods and continues "exactly, and as punishment for complaining about your masters decision..." the way he said master made Brenda shudder, but Nick picked up Brenda's panties that she had pulled off at some point during her munching session. And with one swift movement he formed the panties into a small misshapen ball and pushed it into the hole his softening cock had just retracted from. "There we go, as punishment you'll have to keep my cum in there until you get home!" he said with a large irritating grin on his face.

"What?! But-" she turns to you, but all you can do is laugh. "No Brenda, Nick is right. This will be your punishment, now go clean up and go home. I'll see you next week!" You stroke her hair and the give her a pat on the head. "Aaaahrg, fine!" she gets up, a bit wobbly in the legs still, and walks off towards the mirror to redo some makeup and fix her clothes.

Nick grabs a piece of toilet paper and wipes his cock clean before shoving it back into his pants. And as you pull up your panties and you redo your skirt her sticks out his hand to help you up. "I think you have some explaining to do Alice... don't you?" he says with a mischievous smirk. You grab his hand and he pulls you up off the toilet and helps you regain your balance as your legs are equally if not more unstable than Brenda's were. "I don't think I do actually. You know everything you need to." you answer, as you hook your arm around his and you exit the bathroom together, making sure the coast is clear as you are exiting a girls bathroom with a guy. "What do you mean I know everything? How did you two become friends? How long has this been going on? Hell, I didn't even know she was bisexual or that you were... what? Gay? Bi?" Nick bombarded you with questions, but you didn't feel like answering with any sort of detail, so simple direct answers were all Nick would get out of you for now. "We aren't friends, she just does what I say. It's very new, this was actually our first time together, and we're keeping it a secret, so don't tell anyone. She only recently found out she was Bi, she always thought she was straight. I'm not ready to label myself as anything, but I guess bisexual is fine." As quickly as he bombarded you with questions you rattled off answers to all of them.

"Well, I think it's hot. You know, what you two have? I'd love to have my own little pet who would do whatever I asked her to." "Well, this position is quite new to me, but it's quite intoxicating to have that much power over someone. But that's why you have to be very careful not to lose yourself to the power!" you explain, putting on a silly old man voice turning it into a joke. You both laugh, but you know that what you said was true. Brenda wants to do what you say, so unless it's something she literally can not do, or knows in her core that she shouldn't. It might become an internal struggle which could break her. "So you're not gonna tell me how you got the class queen to be your little pet?" Nick asked again, but you had already decided it wasn't going to happen. You say "Nope" as you mime locking your mouth and throwing away the key, "what makes you think I would tell you Nick? Sure, we've always been nice to each other out of social obligation, but we aren't friends, we're acquaintances. I'm not going to share my big secrets with you." You say with a smirk, but Nick can tell that you're only half joking.

"I suppose you're right. But maybe we can become friends? You doing anything this weekend?" you're caught off guard by his forwardness, and unsure as to whether he actually wants to be friends or if he just wants to know the big secrets you mentioned earlier. "As a matter of fact, I am. Going to spend time with my roommate, every once in a while we try to spend a weekend together just doing girl stuff. Watch some movies, play some games, go out. That sort of stuff." you tell him, "alright, well then I'll see you Monday and maybe we can hang out some other time." He flashes you another smile and you nod, "yeah, maybe".

And so you continued talking as you head out and part ways.