"First Time, And Second Time, Getting My Balls Kicked" or "Discovering My FWB Is Kind Of An Unreal Domme"

I starting seeing Isabella when a mutual friend asked if I wanted to come over one night and hang for a bit. I arrive and Isabella was there too. Straight dark hair, a stocky, muscular build, with a healthy layer of fat that added a lovely curvature to her "burgeoning athena" build. My friend goes to bed and Isabella and I are alone. Isabella sits next to me and says she asked my friend to call a boy over for her to have some fun with. I quite willingly obliged. We make out, move to the guest bedroom, and I go down on her for a while (didn't bring a condom frowny face emoji). She tells me I did well enough to do it again sometime.

Over the course of a few sessions I get familiar with just how muscular this woman is. Large defined calves and thighs, biceps that would otherwise be considered toned if they weren't concealed through her weight. She liked to be eaten out, and often. She preferred to be on top and she got what she wanted. I had fantasized about a scenario where she slapped my balls or squeezed them from behind, followed by a demand that I put my tongue to use. After a few weeks, I couldn't resist anymore. I had to get her to kick me in the balls.

We were laying down naked one day watching a show were someone got hit in the balls. Now's my chance.

"Isabella, have you ever hit anyone in the balls?"
"Yeah, once. A creep at a bar was bothering one of my friends. He was drunk and touching her so I ended up having to introduce his nuts my boots. Dropped instantly."
"Ouch, I bet that definitely hurt coming from you."
"He didn't budge from the fetal position the whole time the bouncer was talking to us. We decided it was best to leave but we watched the bouncers try to get him off the floor to no avail. Once it wasn't a scary situation anymore me and my friend couldn't stop laughing about it!"
"Sounds like he had it coming"
I'm getting red at this point. She's kicked a guy, hard, and laughed about it. I couldn't help myself.
"I've never been kicked in the balls before". I say, fishing for even the slightest bit of inquisition from her.
"You've never been kicked in the balls?"
"Nope, not even once. I'm curious to know what it feels like."
I feel like I'm beet red at this point. I'm doing everything I can to conceal the fact I'm shaking from excitement and nerves.

She says "I'll kick your balls for you.". I freeze. A thousand thoughts run through my head. It's true I've never been kicked. Not even once. Now I've got the opportunity but a twinge of fear moves through me. She was strong. She squatted, leg pressed, calf raised and everything. Her muscles were tight and they were large. She just casually told me a story of kicking a man's balls so hard that two bouncers couldn't get him to move. Is this what I really wanted? What if she kicked them too hard. That thought, of her doing something irreversible... was the hottest thing I could think of.

"I'd like that"

She got up and told me to spread my legs. A command that made me harder than I had ever been. A spread my legs a little more than shoulder width apart. She grabbed my shoulders and said "Not far enough". She pushed my ankles out with her foot until I was almost comically spread apart. "Much better" She says as she lightly tapped my balls. She tells me to hold my dick so it isn't in the way. Not a problem, as it was in a full salute already.
"So, how hard do you want this to be?"

I want to tell her to try and kick them off but I hesitate as that's something that she could realistically accomplish. Instead I tell her " I'd like whatever you would consider the 'full experience'."
She nods and asks " Do you want to close your eyes?". As if I'd miss seeing this. "I think I'd like to watch.:. "Oookay" she says, giggling to herself.

She pulls back her leg and releases... a light tap?

It connects with my balls and I let out a small groan but this isn't anything close to what I wanted.

Isabella asks "How was that?"

I now know for sure I want it harder. I want to be like that guy at the bar. I wants my nuts to bend around her merciless foot.

"That didn't really seem like the full experience."
"I'm a little scared to give you the full experience. I'm not some dainty little beach bunny.". She spreads out her arms to gesture at herself. Point taken. She says "And, not to speak too seriously, but, what if they like, rupture? I'll kick you hard if you want to buuut just understand the risk you're taking" She chuckled to herself after her heavenly lips muttered "Rupture"

I've had this kink for a while. I like the idea of the more extreme stuff. But let me tell you, when a real life women is standing in front of you bringing up the possibility of her actually castrating you, literally kicking your balls off, it's an ecstasy like no other.

I tell her "Go for it. If they pop, they pop". I couldn't believe what I just said. She covers her face and starts laughing. "Okay. If that's really what you want!". I could tell by her stance she was taking it more seriously. Her calves seemed tighter, her eyes more focused. I was shaking. I couldn't believe it. She slung her heavy leg back. "Last chance babe.". "I'm ready.". With one last glance into my eyes she catapulted her legs towards me. With a resounding wet SMACK her toes launched my balls into my pelvis. She drove her foot all the way through until I heard a crunching sound from my testicles. No sooner than the moment she pulled back, I collapsed to the floor like a ragdoll. I couldn't move a muscle. I was paralyzed in the fetal position. I had to use every neuron not currently occupied with telling me my nuts were just punted by an Amazonian to stop myself from throwing up. I look up to see Isabelle doubling over from laughing. She sees me looking at her. She approaches and says "Was that what you wanted?" all the while still giggling. If I would have spoke I would have vomited.

It takes me a few minutes to be able to lift my torso up even a little. She's totally unbothered by the state I'm in. Then she does something unexpected. She sits on the bed next to us, brings her foot under my chin, and raises my head to meet her gaze. "Since you're not doing anything important right now, why don't you put that talented tongue to work". Through the sheer power of blinding horniness, I move myself to the edge of the bed, uncup my seemingly shattered balls, and lick her to an orgasm. After, she told me I did a better job than usual and that she needed to kick my balls like that everytime she wanted head. A terrifying thought, and an rapturous one.