Coming from the Wayward side, I agree with Zew...I was very, very sloppy. Thought I was covering tracks slickly, but W knew something was up. My habits had changed and even though I thought my explanations were "good", the LBS knows. After a few weeks of this, W followed me...again, I thought I was covering so well, W would never know something was up. She continued to follow me to see I was at OW's house 3 or 4 times. W didn't say anything...she waited for me to say something. All I did was keep making up excuses, half truths, and lies. Once you are wayward, you dig yourself in deeper and deeper. One "half truth" turns into another...then you are outright lying and hiding things (such as emails and phone calls). It's a horrible way to live, if it's even living at all.
After W asked me to move out back in August 2013, we talked a bit. I offered to be completely transparent...all passwords, phone history, etc...but at that point it was too late. W said she couldn't move on with me because she would always see me with OW.