My girlfriend gave a blowjob to a stranger at a Halloween party with a big black cock

Last night, we went to a Halloween party at our friend's house. My girlfriend and I were both dressed up, and we were having a good time drinking and dancing. But then, this big black guy showed up, and everyone started talking about his big cock. I knew my girlfriend was into sucking big cocks, so I told her to go over and give him a blowjob. She was hesitant at first, but then she stood up and walked over to him. She knelt down in front of him and started sucking his big black cock, while all the other guests watched. It was a hot sight to see my little girlfriend sucking on a big black cock. After she finished, she came back to me and we continued partying. But the memory of her sucking that big black cock will stay with me for a long time.