Fantasizing about being cucked by my female coworker

I have a fantasy of being cucked by my old female coworker, she is gorgeous, dark skin, Short, big boobs, great face and has a nice ass. I had a small crush on her but eventually the feelings faded and turned into fantasizing about her being with someone else. I fantasize about us going on a date, her dressed up in a nice dress and us having a good time/great conversation. I spoil her with flowers and other gifts. But after the date is done, we go to her apartment, and I watch her get fucked by her boyfriend. I watch her get ruined and realize she belongs to him. I get so excited thinking about this every now and then.