text: If I were you I'd tell the guy that since his girl doesn't want to watch then maybe it's not such a good idea to proceed with the prior arrangement.  You might even have a one on one with her (talking) to see exactly what the problem is, she's either (A)Just not comfortable watching her man performing with someone else even though she's OK with it, or (B)Doesn't like the fact that he's into that sort of thing (swinging).  Just do whatever you thing/feel might be better for everyone involved.