Cuckold fantasy of my friend

I am 20 male Aussie , my friend who is a Aussie as well who has been in a relationship for 2 years. His and him asked me if u wanted to join in with us for a night, so I was hesitant at first but I went with it anyway so I flirt to the house and they welcome and we chat around for a while and create the mood for it I started to get a feeling that he was pushing me to his girl a lot to take of her clothes so I tollbooth of her clothes and she did the same to me and started sucking my cock and he just sat there and she started comparing my dick from his saying this is a real man’s dick and brings out a cage and caged his fyi( he had a small dick and was into sph but I didn’t know that until the end) and I start fucking her and she starts to humiliate her own boyfriend and I am like okay if that’s what gets u going and that the end when I finish in her is when she says that they are a cuckold couple and he likes to be caged and be humiliated. I enjoyed it but it was weird to me but fun as well.