unexpected threesome with my boyfriend and his friend

So, I'm from Denver and just had a wild experience I can't stop thinking about. My boyfriend and I were having a pretty intense session on his couch, and we were both really into it. We were so wrapped up in each other that we didn't notice his roommate walking in.His friend sees us and instead of leaving, he just watches for a moment. I'm embarrassed at first, but the idea of being watched turns me on even more. My boyfriend notices him too and invites him to join us. I'm a bit shocked but also curious, so I nod yes.Next thing I know, I'm on my knees with my boyfriend in front of me and his friend behind me. They're taking turns while I'm just lost in pleasure. The feeling of being filled from both sides was intense and overwhelming. I could feel every inch of them, and their hands were all over me.I never thought I'd be into something like this, but it was one of the most exhilarating experiences I've ever had. We went at it for what felt like hours, and I'm definitely open to doing it again. Just thinking about it makes me wet all over again.