You froze when you saw "Em". You assumed "Em" was short for "Emily", or "Emma". You never imagined it would be short for a name that starts with M - such as "Madden". Your Madden! Your ex-girlfriend Madden, laying on Nikki's couch right in front of you!
Madden was obviously just as shocked to see you as you were to see her. But while her look of shock quickly morphed into a frighteningly amused smile, your own look of shock was not fading at all. Nikki easily noticed both your faces, and asked "Um, did I miss something?"
"Em" told everyone about your history. They were shocked. You were still shocked! You weren't sure if your mouth was still hanging open, but you wouldn't be surprised. Nikki asked her if she still wanted to play, given your history together. Madden looked directly in your eyes, then down at the spiked cage on your cock, then locked back onto your eyes and said "Oh yeah. Definitely." You swallowed a lump in your throat as Nikki sent you to get a round of drinks for everyone.