Bill Mitchell, a private investigator and author of The More You Know: Getting the Evidence and Support You Need to Investigate a Troubled Relationship, describes the eight signs of adultery.
Adulterers become overly sensitive, touchy or closed about their actions.
Changes in Affection and Sexual Activity:
The adulterer merely goes through the actions and doesn’t satisfy his/her spouse anymore.
The adulterer buys things to please.
Adulterers quickly make up needed stories and excuses.
When your spouse is spending too much time at the same place, you should be wary.
The Need to be Alone:
Spouses who use excuses to get out of the house create suspicion.
Pattern and Lifestyle Changes:
Dramatic changes have a reason. If you have no clues for them, probe for answers to these patterns and lifestyle changes.
Be suspicious when your partner’s clothing is inappropriate for certain appointments/events.