First Time Watching

My wife’s boyfriend is coming over our house for the first time tomorrow. She’s given me the option of staying here to play with them, or to find somewhere else to be for the night. I’ve been looking forward to being there with her and her boyfriend, but I am feeling really nervous about it. Watching and participating has been a longtime fantasy of mine but I’m surprised at how apprehensive I’m feeling. Is this relatable at all, should I just go for it?