It isn’t really difficult to see the signs of a cheating husband. But
before confronting him, you must first learn the power of observation.
For if you accuse right away, you may be risking damage to your
relationship if you discovered that your accusations are wrong. Learn
to observe and not be obvious about your suspicions. Let him not know
about your suspicions for he will have the tendency to be more careful
and guarded.
Read more here:
http://www.cheatingmanual.com/articles/signs-of-a-cheating-husband/