I totally understand how you felt because I had an almost identical evening with my white ex-wife... I wasn't locked out of the room, so I was able to watch everything that was happening, but it had frustrated me so much to see my ex being so excited and having such fun with a very dark black friend, like the one in the video, that it completely blocked me. I didn't get hard, but I was really wet, my cock was dripping wet and it wasn't until the black guy came home that I got my hard-on again, but my ex had cum so much that she was tired and went to shower and then go to bed. I jerked off like crazy, 3 times in a row because I was so excited thinking about what had happened. Then my ex was no longer the same and every time I wanted to fuck, she made me watch a movie like this first. She masturbated like crazy and came several times in a row. Then when we made love she wanted to do it in the dark to imagine she was making love with a black man.
I'd call that a classic example of bad fucking timing. The first girl I slept with said to me "If you find something a girl likes, KEEP FUCKING DOING IT! Don't change to doing something else!" Great advice. If you watch her, she was really getting into the experience - so what does he do? Pull out and lie on his back. Possibly her pussy was getting pre-orgasm tight and he wouldn't have been able to hold back and keep doing the scene - but it sucked for her. I'd love to see the full video.
So it's cool everything without a condom, something like that makes me horny and that's why I only fuck with black BBC without a condom. I also like to be a marriage.