YOu can give this a read too SG.. There is a book by Glass called Not Just Friends published in 2004 which is heavilly researched in this subject... Highly reccomended.. MWD even submitted the endorsement for the text...

Glass takes infidleity seriously... she does NOT play softball...

http://www.psychologytoday.com/print/25300

SUnny you will likely get a lot out of it too... i you haven't read NJF yet.. this interview is a great sample of what's in the 300+ pp book