Don't know what your state's laws are regarding adultery, but if it doesn't make any difference legally, I might even mention that you already have women giving you their phone numbers, so you won't be lonely for long. Let her chew on that one for a bit...
Don't play games with her. She wants to play, little reindeer games, fine. You be the rock.
I prefer a simple, "I am not going to take dating advice from my estranged wife".
M-47,W-40,No kids D-filed 5/27/2010 Piecing - 10/21/2010 -=Soon to be banned=-