A very slutty ex

I'll tell you about a story I had with a girl many years ago. I'll call her Giada here for obvious privacy reasons.
We were both about eighteen and had met through mutual friends; she was known in town for being a huge slut, and most of my friends and acquaintances had told me about her blowjobs.
I'd actually had a few stories, and not even the most sexually exciting ones, so I started teasing Giada to test her renowned sluttiness firsthand.
I managed to arrange a date with her until, little by little, we began to see each other as a real couple.
She was a slightly plump girl, dark-haired, about 5'3" tall, with a C-cup bust.
I remember the first time I touched her pussy, I felt like I was touching the size of a fifty-year-old with years of experience, or a porn star like the ones I used to see in movies.
In bed, she was a real slut, and she acted like a real porn star.
Before fucking, she liked to wet her fingers in her pussy and then spread her juices all over my cock, or, just as she was about to come, she'd grab my dick and let me cum on her tongue. She'd pant loudly with every thrust, but what I loved most was when we'd fuck side-saddle; while she was riding, she'd grab my balls with one hand and try to slide them into her pussy.
At the end of every fuck, she'd always tell me her past stories, talking about the first guy who'd broken her ass, another who'd hurt her when he penetrated her because of his big tool, another who'd shove his cock deep into her throat and cum all over her.
One time, I decided to test her out while we were at the beach.
We were lying in the sun and there were very few people around; at a certain point, a group of guys arrived and settled down a few meters away from us.
As soon as Giada saw them, she got up from the sunbed, took off the top of her bikini, and with her breasts on display, she went to her backpack, lit a cigarette, and lay back down.
I looked at her in amazement, and she said,
"Don't tell me you're shocked if I'm topless and others watch me! It's nice to be watched, and I like to offer myself to everyone!"
That sentence really annoyed me, but it also turned me on, so I decided to enjoy her porn star style a little.
I said,
"Show me how you can captivate your viewers... go on!"
"Okay, if you're that keen! But I want to know what you think afterwards!"
She stood up and wrapped a sarong around her waist, taking off the bottom of her bikini. She walked toward the boys with bare breasts among the bathers who were watching her in amazement.
She asked one of them for some sunscreen, took it, and began slowly applying it to her tits with provocative movements.
She massaged her tits, pushing them up and down, then stopped to squeeze her nipples, which were about three centimeters in diameter and had grown almost two centimeters long after being massaged.
She put the finishing touch to her show when she squatted down with her legs spread, pretending to return the lotion to the boys, who were watching her, stunned, horny, and amazed.
The slut defiantly came to sit next to me and asked:
"So what do you think!? I was a real showgirl!"
My mood was somewhere between anger, jealousy, and absolute lust! I wanted to tease her further and said:
"Well, actually, I expected something more!"
"What do you mean!"
"You said you belong to everyone... why don't you finish your show?"
She looked at me, smiling, and replied in an annoyed tone,
"I get it...you're really trying to provoke me!"
She put her bikini back on and walked toward the group of guys again. She spoke to one of them for two minutes, and then they went into the water together.
I approached them, staying a few meters away; the slut dived in and resurfaced in the boy's swimsuit, showing it to me with a challenging look!
She dove in again, staying under for a few minutes. She came up again to catch her breath, laughing heartily at her friend, and then dove in again.
After a while, she came back up and greeted the guy; she approached me and said,
"I gave him a blowjob he'll never forget!"