three-way call || armin x reader x eren

the arrangement

"I mean, I could get used to that."

You couldn't help but snort at Eren's comment. You looked at Armin, and recognized the blush on his cheeks he usually had after sex. You only realized you were smiling when you felt his hand cupping your cheek gently. Armin's blue eyes locked with yours for a brief moment before you pressed a cheek in between his eyebrows. You removed yourself from him carefully and put your sweater back on.

"I need to clean up," you announced and both men nodded as you headed outside the dorm. Eren stayed in silence as Armin got rid of the condom and put himself back in his pants. The blond was still blushing profusely, the realization of the situation he was in coming down on him.

Eren is still in his same spot, his posture relaxed as if he wasn't jerking off to his best friend and his girlfriend just a couple of minutes ago. Armin wished he had the same confidence to at least pretend he was cool about it.

In a way, he was. He had definitely enjoyed knowing Eren was watching him as he pounded into you. Armin looked down at his hands and remembered how tightly he was holding on your hip and he thrusted inside of you. You had ridden him before, sure, but it was never like this. He had never been so dominant over you and boy did he want to try again. While you always tended to take the lead in your sexual encounters, there was something arousing about him having all the power and watching you let him take it.

The memory of your watering eyes and quivering mouth as you begged for more had his cock twitching.

He looked back at Eren, who was now with his phone. The only explanation he could think about on why he wasn't freaking out was that this wasn't the first time he had done it. Wanting to break the uncomfortable silence, he couldn't help himself from asking.

"Have you ever watched before?"

Eren looked up to the ceiling, squinting his eyes just a bit as he tried to remember.

"Porn? Some cam girls. Although I don't think their streams were really live as they said," he shrugged. He leaned his head to Armin. "Have you never watched?"

"I mean, porn? Yeah, uh– I guess. A couple of times. Not a lot."

Eren chuckled.

"That's what someone who watches porn every night would say," he teased him.

"Hey, that's not true," Armin pouted.

At that moment, you returned to the dorm and walked to Armin, sitting down by his side. Since your panties were still wet and inside your boyfriend's pocket, it was hard to find a comfortable sitting position without flashing Eren in this process. You ended up in a kneeling position.

"You denying it like that doesn't make it better," Eren chuckled. Armin whined in frustration and you raised an eyebrow at the two men.

"Denying what?"

"Armin is denying he watches a lot of porn. How about you?" he asked. You pursed your lips, trying to remember.

"Porn doesn't really get me off. Not anymore at least," you shrugged.

"Well, watching people is kind of like watching porn but better. That's what I was trying to explain to Armin," Eren said.

You blinked, considering the scenario. Porn had stopped working for you a while ago so the perspective about watching people live being better definitely sparked some interest in you.

"Since we're all already here, do you wanna try?"

Your head shot up to your friend, eyes wide open. Armin and you looked at each other immediately, both of you looking as shocked and excited as you could be. There was a glint of arousement in your boyfriend's eyes and you couldn't deny the idea made your legs clench against each other. But was it okay to cross that line? Neither of you said a word, too expectant of what the other would think to be able to take the first step.