"Are you going to show the girls your new lingerie?", he asks, entering the room as you and your gf's drink and chat. It's not really a question though and your cheeks flush beetroot as you stand up and lift your skirt. "Do a little twirl for them."

The room explodes into giggles as they see your gleaming steel chastity belt. One of them reaches forward, strokes her fingers against the brushed leather that sits between your thigh and your groin, making you shiver with excitement given you've not cum for a week.

"Here's the best bit", he says, handing your bestie the control to the vibe fixed inside of it. She takes your hand, presses the button, and you instantly grip it, hips rocking. Soon you're doubled over, shaking. She pulls you into her lap, stopping that vibe as you hyperventilate, about to cum.

You reach for the button but she snatches it away..."no!". With puppy dog eyes you turn to her, "pleaaase" you whimper, begging her for that orgasm. 

 "You ask so nicely", she says, sliding a hand up your tummy and over your breast until she has one of your hard nipples between thumb and forefinger and is rolling it between them, before grabbing your whole tit in her hand and squeezing it tight.

"I fucking need it!", you say, still looking at her.

"Oh I see! Nice and nasty all rolled into one? Very well then girl." She presses that button and once again you're convulsing in her lap. She's still massaging your tit as you fling your head back, open-mouthed and panting, cumming so hard in front of them all.

Your bestie nestles her face into the nape of your neck, kissing it, stroking her tongue over it. She pushes her fingers into your mouth making you suck them as your convulsions become more erratic, those orgasms absolutely consuming you. "Good girl!"

As you open your eyes, the whole room is transfixed by you as she stops the vibrator. Your cheeks glow red and you turn and hug her so tight.