My [26F] girlfriend is about to cuck me [26M] for the first time!

After a long time of dirty talk and fantasizing about her sleeping with other men, it's finally becoming a reality. We found him through Grindr—he's fit, well-endowed, and very polite. He also has experience being a bull in cuckolding dynamics, which was definitely a plus, and he really hit it off with my girlfriend when they chatted. However, he preferred to meet her privately for their first encounter.
So here I am, caged and patiently waiting in the car as I write this, about and hour after dropping her off (his place is in a nearby town at a half and hour drive). My loving girlfriend is at her bull's place, with the key to my chastity cage hanging around her beautiful neck. I’m going crazy with excitement imagining what might be happening.
It’s honestly wild when I think about it—after more than five years in a monogamous relationship, she’s probably having sex with a guy we just met! This fantasy has massively boosted her libido, and I’ve started to see a sluttier, more uninhibited side of her that I love—a side that’s been growing ever since I first brought up this kink.
I helped her get ready for the date by shaving her and dressing her, like a good cuck-to-be, and she was already getting wet just thinking about the possibility of sleeping with this guy and telling me all about it afterward. I’m so excited that we’re finally taking this step into a new lifestyle, and I’m absolutely dying to hear every detail of what happened during our reclaiming fuck once we get back home.

P.S. She just texted—she’s getting into bed with him! I instantly strained bad in my cage, lol.

UPDATE: About 30 minutes after she told me she was going to bed with him, I received a video from her. My heart instantly started racing. The love of my life, completely naked and on her knees, eagerly sucking her bull's cock while he gently stroked her hair. I had to get out of the car and walk around. Seeing a video of her sucking a cock that is not mine is surreal! The emotions are so intense!