So a while ago I found out my wife had shown her friends what I look like in chastity, and when she stuck needles into my balls(real), and that’s she had her friends over and they made sly comments towards me hinting they know(real). 

(Fantasy on that)
So a few months go by and my wife wanted to have a get together with them again, and I say sure, I need to do some yard work so you all hang out and I’ll be working outside on the yard.

They all come over and are hanging out in the house while I’m outside in the yard. After some time my wife calls me in and I find them all sitting on the couches and my wife looks at me and says;
“Baby, they don’t really believe that you’re locked in a 1-1/2” chastity cage. I need you to show them”.
Now they’ve all been drinking so at this comment they all start laughing. Meanwhile I’m standing there in shock and disbelief. I can feel my face getting hot. I look at my wife with a look of shock as if to say;
“Really are you serious”?! 
One of her friends pipe up,let’s call her “A” and says;
“You should really listen to your mistress”!
I can feel my face getting hotter… My wife looks at me again, this time with a VERY serious look and says;
“Well we’re all waiting”…
Again I look at her and say;
“You can’t be serious”.
“Do as I say! Otherwise you WILL pay for it later”! She replied.
So reluctantly I start undoing my belt and I hear them cheer! “Yay! Do it”!!!
I pull my pants down leaving my underwear up and look at my wife(mistress) again as if pleading to not. She just stares into my eyes as if to say “well”…
So I pull down my underwear leaving my little caged nub now exposed too her friends(“A” “K”).
They just start to burst out in laughter. Meanwhile my wife if giggling and looking at them as if to say; “see I told you so”.
I start to pull them back up and my Mistress glares at me and says;
“Did I tell you you can pull them back up”? 
I look at her again pleading.
“Take off your cloths and get us some more drinks, NOW”! 
So I do as I’m told, meanwhile they cheer some more. After I’m naked wearing only my cage I go to the kitchen and pour them some more drinks. I come back and give them their drinks. After which “A” says 
“so didn’t you say you poked needles into his balls”?
“Yes quite a few time now” my mistress reply’s.
“I’d love to try that myself”! Says “A”
“Oh god me too”! Replies “K”
“Well let’s do it then! Go get the straps subby”! My mistress commands.
In fear of what might happen I go get them, and soon find myself strapped to the chair with my big balls resting on the seat.
“How many have you done”? Asks “A”
“5 in each” says my mistress.
“Oooo! Can I do some”? Asks “A”
“Wait! I want to do some too”! Says “K”
“Absolutely”! Mistress replies.
They all decided that they each get to do 3 each and are soon poised to stick them in. Each one, all 3 women, do one by one and I then find myself with 9 needles in each ball. I feel like someone has kicked me in the balls with a stabbing numbness in them. 
They start taking photos while laughing at my predicament. 
“Wait I forgot to take a video of them going in”! “A” says.
“Darn! I forgot too! I really wanted to have a video of this” says “K”
“Well let’s each do 2 more”! Mistress says.
They each take turns sticking my balls one by one till I have 15 in each ball while each one takes a turn with the camera.
I can now feel my balls dieing.
“Oh god it hurts! Please take them out”. I ask. 
“No! Not yet! This is SO much fun”! “A” says.
“Yes subby, we have too leave them in for at least an hour. That’s been our deal. Remember”? Mistress says.
Meanwhile I’m sitting there strapped down, and they all start “playing” with themselves and each other while I can do is nothing but sit there in pain looking down at my balls as if they were a pin cushion. 
They all cum multiple times and then finally realized that I’m sitting there with my pin cushion in pain.
“What if he looses his balls”? “K” asks.
“Oooo! That sounds like fun”! “A” says.
“I wouldn’t mind. After all, I’ve always wanted a eunuch subby” says mistress. 
I look up in shock. 
It’s now been two hours since I’ve had all 15 in each ball. Finally my mistress says;
“Ok let’s take them out of his pin cushion”. Says mistress. 
So they each take turns pulling out one by one till my pin cushion has no more needles in while they all take turns filming. 
They unstrap me and leave me too take care of my balls while they all get ready for bed. I feel better but even with them all out I feel as if I’m still getting kicked in the balls. 
I climb into bed with my mistress and try to sleep.
“Good night my eunubby”. Mistress says.
We all wake up the next morning and I start putting on cloths and mistress tell me to stop, stay naked and go make us all breakfast. So I do as I’m told meanwhile they’re all chatting about how much fun it was and how they hope they can do it again, if my balls survive that is.
“I kinda hope they don’t though! I’d love to see him with nothing but an empty sac! I’ve never seen one before”! Says “A”.
“I know right! I can’t wait till theirs nothing but mush in there”! Mistress says.
“Maybe next time we pop them! After all with a little penis like that, those balls are useless”! Says “K”.
I just look at them in fear.
After breakfast is done they begin to leave but not before each give me a good squeeze leaving me begging to stop. But they all don’t till each one gets a turn and laugh historically. 
“Next time they’re done for”! “A” says with a wink.
“I can’t wait for them to come over and we do it all again” my mistress says giving my already sore balls a squeeze.

Part 2 and 3 to cum later.