Third Wheel? Maybe fourth

I watched two people interact tonight. Both are in a relationship. Both are willing to cheat on that relationship with each other. I'm the third wheel. It's awkward, but they need to play off of me in order for it to work in a playful, non-threatening manner. I'm here to be the middle man. I allow them guilt free interaction. It's not by choice mind you. I'm caught in the crossfire. They tell each other stories and emote all the caressing and touching willingly. They lean in close, trying to get as close as I may deem "safe" from my observational post. Were I not here, things would most likely happen.

Why am I here? I couldn't really tell anybody. I think it was my idea. Maybe I'm willing to put him here, with her. In my weak-wristed defense, it didn't take any coaxing at all. I'm the willing scapegoat. Do I want to sabotage my friend? I can't really answer that. I'm fucked up myself. Maybe I want someone else to be fucked up like me.