She made me take pictures of her in a thong and garter belt for another man [cuckold’s perspective]

My girlfriend (28F) has been talking about this guy she’s into. Tall, confident, the kind that doesn’t ask, just takes. She told me she wants to invite him over, to our place, and fuck him here. In our bed. While I listen from the next room like a good cuck.

Earlier today, we were having sex, she was already naked, on top of me, grinding slow, making me lose my mind. I was so close… when she suddenly stopped. Just like that.

She looked down at me, smirking, and said:
“You’re not cumming until you take some pictures of me for him.”

Then she got off me, walked over to the dresser, and pulled out a leopard-print thong and matching garter belt with thigh-highs. She slipped it on slowly, looking at herself in the mirror, not for me, for him.

Then she walked out to the balcony and leaned over the barandal, that perfect ass barely covered by the thong, garter straps hugging her thighs. She looked over her shoulder at me and added:
“I want him hard before he even walks in.”

I grabbed my phone, still rock hard and aching, and started taking shots. Her angles, her smirk, close-ups of her ass in that wild lingerie, like she was already posing for his pleasure, not mine.

I sent the pics to him from my phone. I wrote: “She’s ready whenever you are.”

He replied: “Soon.”

And now I’m still here, still desperate, waiting for the message that he’s coming over to fuck my girlfriend, because she didn’t dress up for me. She dressed up for him.