Reply: I'm female and watched porn with friends

Watched some porn recently with my friend (M & F) they are a couple. We are close friends so it wasn’t awkward at all. We actually had fun commenting on it. This was our first time watching porn together.
I was beginning to get super aroused when I noticed M guiding F’s head towards his crotch. M’s dick was out and F was licking it as if I wasn’t there. this is the first time I’m seeing them do something like that. I don’t think they realise I was watching them instead of the porn playing on the monitor. It was dark so it’s hard to see anything.
I was trying to rub myself in a way they wouldn’t notice. Small actions and no sound. Part of me was scared that this might turn into a threesome but the other part of me got really excited by it. I couldn’t go fast and hard enough to climax, it only made me more needy.
I told them to pause the porn while I excused myself to the toilet acting like I didn’t notice anything. When I came back, they were gone. They went back to their room and fucked hard. How did I know? I was listening from the sofa while rubbing my clit. I came a few times, packed up and left before I can get to the point where I can’t stop, I can literally rub myself hours.
I don’t know if they wanted me to see/hear that or I actually caught them in the act, either way, this encounter was super hot to me. I don’t know if I should bring it up to them. Maybe they wanted me to join and I acted uninterested or I might be thinking too much into it. I do want to see them do it again, heck, I want to see them fuck. Does that make me a cuck? Or a voyeur?