Girlfriend turns me into her cock slut

I was 18 and even though I had suck two different cocks by then I didn't think I was bi. My gf massaged and sometimes milked my prostate daily. I had never admitted to being with a man in anyway. I came home and she was sitting on the couch next to james. James was my second cock but the first one to cum in my mouth. He made me swallow btw. She said why I didn't tell her. I was embarrassed and stuttered an answer and apologized. She stood and grabbed me by the hair and pulled me over to james. You shouldn't have lied to me. Your punishment starts now and ends when I deside, now strip and get on your knees. I did as told James stood and I pulled his pants and underwear down. His 10" long A3" thick cock was half hard a couple inches away. I grabbed the base stuck it into my mouth went all the way down til I gagged and he got harder. Slowly I sucked his cock until he was fully hard. He directed my head with one hand making me gag every year he forced me to deepthroat him. My gf was cheering him on. After 20 min or so James stood up and she help my head with both hand as be buried himself down my throat. I gagged and she told him " I'll hold him you facefuck him" . James obliged and went slow for a couple min then started fucking my mouth hard and fast. I felt his balls bouncing off my chin and after a little bit I quit gagging. He was pounding my face hard and I heard him say he was about to cum she told him he's all yours. James grabbed my hair pulling hard he told me to do it like the last time. I opened wide sticking my tounge under his head one hand jacking his cock and my other played with his balls , he moaned and I felt his hot salty cum shot into my mouth his hand grabbed my hand stoking faster he moaned loudly as he started to cum but he moed hos cock around as he did covering my face and beard with his cum. I licked all the cum off his cock and balls. Then I heard cherry say I've bought lube for his ass and I knew this wasn't the end of my night