My girlfriend's boyfriend put me in my place (sissy story)

Today I arrived from work and my girlfriend ordered me to change clothes immediately. She made me put on a super short pink dress, ruffled socks, and well-made-up slut, matching the bra and panties I always wear and thought she just wanted to see me dressed appropriately until the doorbell rang and I felt like my clitoris was trembling in its chastity box. My girlfriend went downstairs to open the door, telling me there was a surprise, and when she came back, a man around 50 years old, tall and wide, was with her. Virile. -Come on, little faggot -my girlfriend said while the man looked at me amused-, say hi to papi. -Hi papi -I replied obediently, giving him a kiss on the cheek and bending down without bending my knees to kiss his bulge as my girlfriend had taught me. I felt so girly and embarrassed all of a sudden, knowing that this man was looking at me like an absolute sissy and probably not for the first time that my girlfriend had talked about me to him. He laughed at me, with his cock half-erect, and told me to lift up my skirt to observe my clitoris. -And what's this, little faggot? Do you like having your cock like this? Why? -he asked. I was all red, feeling super exposed, but knew I'd be punished if I didn't respond appropriately. -Yes papi, I love having my clitoris locked up because it reminds me of my place. He grabbed my balls and squeezed them, making me moan like a total sissy until my girlfriend told us to go to the bedroom. There, while she was undressing, papi turned me around, pulled down my pants, and put a plug in my pussy without asking first, laughing at how I was moaning and my ass contracting. Just when my girlfriend called him, he put my pants back on and told me to sit on the floor next to the bed with my legs open. Between kisses and caresses between them, my girlfriend came over to amuzzle me, just before doing so she spoke: -Tell papi if you want to touch your tits while listening to him make himself mine. It's now or never. I felt the plug deep inside me, I was so humiliated by the situation, it made me feel like a total sissy. I felt the rubbing of my nipples against the bra. -Please, daddy -I said, unable to avoid sticking out my butt-, Can I touch my tits while you're making out with my girlfriend? Daddy took her breasts and started playing with her nipples, making her moan. -Like this, little faggot? -he asked- Do you want me to treat you like a girl while filling your girlfriend's cum? I'm going to make her cry with my cock and you'll be milking your tits... -Yes, daddy, I love touching my nipples while my girlfriend gets cocked by my girlfriend, it makes me feel like a total little faggot. Daddy laughed again and pulled out some clamps from where we keep the toys. He put them tightly on my tits, torturing me. I couldn't complain much because he immediately gagged me and gave all his attention to my girlfriend. Soon I heard the bed moving and her screaming for cock while daddy was calling her a slut and spanking her. I was facing away, unable to look at them, thinking about how my girlfriend was satisfied by a real man while feeling the plug in my booty and the clamps on my nipples. Every time more needy, I started wishing that the gag in my mouth would be daddy's cock. Maybe they'd let me clean them up when they finished. After a long time, I heard my girlfriend have an orgasm and then I saw daddy again in front of me, with a condom full of cum in his hand. He took out the gag and I immediately opened my mouth and stuck out my tongue, ready to swallow everything. He threw the semen in my face, some of it falling into my mouth and he slapped me with his flaccid cock. -This is a real cock, little faggot. He left your girlfriend's booty well open for the slut. I swallowed the semen in my mouth. -Thanks for screwing her and giving me cum, daddy. I love being put in my place. My girlfriend, still in bed from the butt-fucking, reminded daddy that there was still some good spanking to be had like every night. I had to get into position, well submissive on daddy's lap and endure ten spankings, much harder than my girlfriend's. I thanked each one, even the ones she gave to my girlfriend after me. We two remained with our Booty all red, marked like their slutty. I never felt more humiliated. Papi stayed to sleep, without letting me change or wipe my face. He made me go to sleep on the couch, where I could keep fantasizing about his cock, which kept coming onto my girlfriend.