With the Amazons' Secret Weakness

"First thing's first," Kara said, looking back to Wonder Woman, "Strip."

Wonder Woman looked like she was going to say something, but a glare from Supergirl was enough to make her hold her tongue. Dutifully she kicked off her boots and pulled down her panties to reveal her hairless pussy, which made me wonder if all superheroines went commando under their costumes. As she moved to start undoing the straps of her bracelets though, Kara stopped her, "No no, those stay on. Same for the tiara. I don't want anyone here forgetting who you are, Wonder Whore."

Diana's face went red at the degrading name, something that caused Kara to smile. She then turned back to me, "Charlie, do you know what Wonder Whore's weakness is?"

"I didn't even know she had one," I admitted.

"Not a lot of people do. It's something she keeps secret, at least partially to protect herself, but mostly I think it's because of how embarrassing it is."

Wonder Woman's eyes went wide, and she choked out a weak, "Kara..."

"Don't even start with me, bitch," Kara snapped, "If anyone deserves to know this, it's him. Now, where was I...?"

She walked over to the discarded Lasso of Truth and picked it up off of the ground, "The superhuman abilities of the Amazons come from blessings that were bestowed upon them by five Greek goddesses. But those blessings come with a catch: if they willingly allow themselves to be bound by a man they lose their powers until freed, making them no different than any human woman. Now Diana here is a special case, being a demigoddess and all, so that little rule doesn't apply to her..."

Kara gently placed the golden cord in my hand, "...unless you use this. Hope you know how to tie a decent knot."

"I think I can manage that," I said, rubbing the lasso between my fingers.

"Good." She snapped her fingers in Wonder Woman's direction, "Turn around and put your hands behind your back."

Hesitantly, Diana turned around and held her arms behind her, sticking out from her back as an offering in my direction. Slowly I approached her and began wrapping the golden rope around her wrists. It wasn't the cleanest work, but before long I had a simple knot binding her wrists together, with enough of the lasso left over to make a for a lead of decent length.

As I finished tying her up, I could feel a change come over Diana. Though she physically didn't look any different, it was almost as if she lost an aura that I was only aware existed now that it was gone, and even now I couldn't say whether it was real or a trick of the mind. Either way, I could tell that the power she had just moments before was gone.

"Oh my," Kara said with a smirk, her eyes drifting downwards, "Looks like someone's getting excited about this."

I looked down at my crotch for a brief moment, thinking that she was referring to me. While I was indeed hard though, it didn't take long for me to realize that she was actually looking towards Diana. Bending down to look between her legs, I could see a wetness beginning to form just before Diana crossed her legs sheepishly.

"Ask her if this is getting her off," Kara said excitedly, "And make sure you're holding the lasso when you do. I want the whole truth from her."

Curious as to whether it would actually work, I held the end of the lasso tight in my hand and asked, "Are you getting off to this?"

The lasso glowed, and Diana blurted out, "Yes, unbearably so."

This surprised me, given her prior **** and her public image as... well, Wonder Woman. Perplexed, I asked, "Are you secretly a submissive?"

"I'm a switch," she answered, "Whether I want to be in control or not depends on the person and the situation."

"And what do you want right now?"

I could see her skin flush with embarrassment, "Right now I want you to punish me and treat me like a cheap whore."

"Veeeeery interesting," Kara said, "Sounds like she might have some fun tonight after all. But let's see if we can make her regret those words anyway. To the bedroom!"

I followed Kara to the bedroom, leading Diana behind me with the lasso. I couldn't help but watch her as we walked. The Amazon princess kept her head down, her face still a bright red from the embarrassing admission she had just made. But I could also see that her nipples were painfully erect, and she was so wet that her juice was starting to run down her legs. Seeing the person who was easily overpowering me not even an hour ago in this position was, I'm not gonna lie, pretty damn hot.

Having entered the room ahead of me, Kara pulled the curtains of the large picture window shut, isolating the three of us from the outside world. She then flew off to grab a chair from the other room, which she positioned facing the bed.

"What now?" I asked her.

"Whatever you think she deserves," Kara answered, "I'm just here to watch and make sure she doesn't try anything."

"Try anything? Like what?"

"Charlie, she's an Amazon. Even without her powers she's still a highly trained warrior in peak physical condition. And one of the first things Amazon warriors learn is how to get themselves out of bindings, or failing that how to fight with their limbs bound. If she really wanted to, Diana could kick your ass without even bothering to free herself." Kara floated over and grasped the rope trailing between my hand and Diana's wrists, and gave it a sharp tug, "But you don't want to do that, do you bitch?"

"No, I don't," Diana whimpered.

"That's what I thought," Kara said with a smirk. She let go of the lasso and floated back to the chair, daintly sitting down with her legs crossed, "Still, when it comes to my boyfriend's safety, I'd rather not take any more chances. I'll be right here watching everything, and if I think he's in danger at any point tonight... well, I don't think I have to tell you what will happen next."

A tense silence filled the room, with me now somewhat wary of Diana, Diana intimidated by Kara, and Kara eagerly waiting for the show to start. Eventually I decided to get the ball rolling, and brought Diana to the bed, pushing her onto it face down so that her legs were dangling off the edge and her butt was sticking up into the air. I took a moment to marvel at the luscious booty in front of me, one that most could only dream of getting a glimpse at. I caressed her plush ass, digging my fingers into the soft flesh. Then, almost without thinking, I gave it a hard slap.

Diana let out a high-pitched shriek, her toe curling from the pain. It was the kind of sudden reaction that couldn't be faked, and any doubt in my mind that she was still invulnerable was gone. Kara squealed in delight at this, "Ooh, going with a classic, huh? Spank her again!"

More than happy to oblige, I smacked Diana's ass again. The Amazon squirmed under me, trying and failing to hold back another yelp. To her credit, now that she was aware of what was coming, she wasn't nearly as loud as before. But seeing a gorgeous woman at my mercy, and remembering how she had **** herself on me before, something primal took over my mind. Without hesitation I spanked her again, and again, and again. Soon I was maintaining a rhythm of slaps that kept Diana's butt jiggling like jello. I didn't even bother keeping count, and by the time I finally ran out of steam and had to stop to catch my breath, her entire ass was a vibrant red, with a couple spots even beginning to bruise slightly.

Hearing a small gasp behind me, I looked over my shoulder to see Kara with her legs spread and her skirt hiked up. Her panties were on the floor, letting me see that her fingers were pumping in and out of her cunt. Upon noticing me looking at her, Kara frowned, but her stroking didn't slow down. "Why did you stop? You got something else in mind?"

I turned back to Diana, still recovering from the innumerable blows I had rained down on her. Like me, she was breathing heavily, and her buttocks twitched every once in a while from what I assumed was lingering stings of pain. And of course, her pussy was flush with arousal, juices dripping down onto the blanket beneath her.

All in all, in was a very exhilarating sight for me, one very different from the sexual experiences I've had with Kara so far. Even if the two of us hadn't been keeping things relatively tame up until now, you could only be so rough with a girl whose skin could deflect bullets and needed to use heat vision just to trim her hair. But being able to just let all that energy and frustration loose on a heroine that was submitting so utterly to me, and actually see the results of it on her body... it made me feel amazing. I briefly wondered whether there were some personal issues over what Diana did to me that were beginning to express themselves or if I was just discovering a new fetish for BDSM, but that moment of self-reflection was abandoned as a more immediate desire pushed itself to the forefront of my mind.

I was incredibly horny, and it only now hit me that with how quickly things had progressed I hadn't bothered putting on a new pair of pants to replace what Diana tore off, leaving my erection jutting out proudly in the open air. My cock was begging for a place to release itself into, and right in front of me were a set holes that were ripe for the taking.