"So, you girlfriend has locked you in a chastity cage, you can't jerk off or anything unless she unlocks you?" Alex said.
"Yes." Justin said. He was already embarrassed about it, which was the point, but Alex knowing? That was entirely different, that wasn't supposed to happen. Having to show her it was even more embarrassing.
Alex laughed. "Can't you just use magic to unlock it?" Alex asked.
"It's magic-proof." Justin said.
"Where did she get a magic-proof chastity cage?" Alex said, examining it.
"I don't know." Justin said.
"Why did you let her lock you up?" Alex asked.
"I thought it would be fun." Justin said.
"You thought not being able to cum would be fun?" Alex asked.
"I thought that her having control would be fun!" Justin said.
"You're so submissive." Alex said.
Justin rolled his eyes.
"You haven't seen her in like, two weeks, you must be getting desperate." Alex said.
"It's part of it, okay?" Justin said. He wanted this conversation to end
"Do you want me to try and unlock you?" Alex asked.
"It's magic-proof, you can't do anything." Justin said.
Alex still tried a few things anyways. She thought she potentially had some tricks she could do, but none of them worked. It really was magic-proof.
Alex had been looking at the chastity cage, but she hadn't touched it yet. But she was curious, so she touched it, surprising Justin, who jerked away.
"Alex!" Justin said as he jerked away.
"What? It's not like I'm touching you, I'm just touching your cage." Alex said.
That didn't make it any better, Justin could still feel her hands on the cage, and as his cock tried to get erect, he did feel her hands on his cock, now she was touching him.
"It looks like you're trying to get erect in there." Alex said, and she giggled.
There were some implications about that, which took Alex a few seconds to realize.
"Why are you getting erect from your sister touching your cage?" Alex asked, with a smirk on her face.
"I'm not, I can't get erect." Justin said.
"Ahah, very funny, why does it look like you're trying to get erect." Alex said.
"Because, like you said, it's been a while since I've been able to have an orgasm." Justin said.
"I wonder if I could make you cum in chastity." Alex said, and she was already fondling Justin's testicles.
"Alex!" Justin said, again he tried to jerk away, but Alex was still persistent.
"What?" Alex said. "It's not like it'll be incest, you're locked in a cage, it doesn't count."
Justin did not at all agree with that, but it was too late. He was horny and desperate and really wanted to get off, sister or no sister.
Alex shook his chastity cage around, which didn't really help at all, but it was only her first idea. The shaking around reminded Justin of being able to stroke his cock freely and it made him even more desperate to cum.
"This isn't working." Justin said.
"Okay, maybe we should look something up on how to make you cum." Alex said.
Justin already knew what Alex was going to find, and nothing he could find would've help him on his own, but with Alex, oh no, she was definitely going to try some of the things that she would find.
"Your girlfriend doesn't stick things in your asshole, does she?" Alex asked.
"No." Justin said, and he was hoping that Alex wouldn't give his girlfriend any ideas, or do that herself.
"Okay, then we'll skip that one, and I've already tried shaking your cage." Alex said, continuing to look. "Vibrations on your cage might make you cum."
Justin was desperate at this point, even more than before, the interaction with Alex hadn't helped at all, he needed to get off now.
"I think we'll try that one, because most of these might be a bit too… close to incest for you if we try them." Alex said.
Just for him? What about for Alex? Those words hanging in Justin's head, maybe he was too focused on those words though. Also, what exactly else did Alex read?
"I've got a vibrator." Alex said. That was honestly not a surprise.
It wasn't one of those vibrators that one can stick inside of them, it was that round headed one that was totally not a vibrator and was totally a massage thing. Yeah, a massage for the vagina, or in this case, the chastity cage.
The vibrator was plugged in and pressed against Justin's cage and his balls, and Alex was gently massaging them. Technically it was being used for somewhat of the purpose it was intended for, it as massaging.
The noises that came from Justin indicated that it was working well. His moans conveyed that he was horny and frustrated and was desperately trying to cum. His humping of the vibrator did that also, and Alex had to make sure that it stayed pressed to his balls and his cage, while not pressing too hard.
Alex was nearly giggling, if it weren't for the devilish smirk on her face watching Justin in both pain and pleasure. "Is it working?" She asked. She knew it was, but she asked anyways, wanting to hear it from Justin himself.
"Yes." Justin said through the moans and the groans, barely audible, but it was confirmation that he was indeed going to cum.
About a minute later, Justin told Alex "I'm going to cum."
"Cum for me Justin." Alex said, smirk still on her face.
"Oh fuck!" Justin said, and to hear him swear was amusing to Alex.
He came a lot, even if he couldn't get an erection, the cum shot out with a lot of force too, and Justin seemed to be having a very pleasurable orgasm despite that fact he wasn't erect. It was amusing for Alex to watch her brother cum, his cum shooting onto her black shirt, mostly, and some of it dripping out onto the vibrator and onto himself.
"Look at the mess you made." Alex said, and she shook her body a bit, showing Justin the obvious, that he had came all over her shirt. "You owe me." Alex said.
Justin hoped that, the next time his girlfriend let him cum, she wouldn't notice that he wasn't cumming as much.