Wife is cheating, am sad but confused?

[HopelessInLove]

It has been a few days and not any true progress that I have noticed. She has been less cold to me. I am trying to see small improvements in our interactions and signs from W. The only real change was 2 days ago when I asked how her day went, she at first gave me th typical response of "every day is the same." But then she started to elaborate on her day for a good 5 min, and then asked about me starting a new job.

We have not been argumentative for about a week. I have been reading a book recommended on a thread gutwrenching had back in March called 'Feeling Good Together' by Burns,MD. I am trying to understand ways to communicate better.

The night I went to buy the book was the night of S birthday and we had family over to celebrate. W was extremely social, just the person she is. When my parents were leaving W said goodbye to my parents and hugged my father, not atypical. But when talking to my dad later he said she held him very tightly and for a long time. What gives? Is she afraid of losing my family? Not trying to read into it. After cleaning up and getting kids down for bed, I came down-stairs and told W I was heading out for a while I had to do somethings. She asked me if I was coming back home. I told her yes and asked if she needed anything and left for 3 hours. When I returned the front light was on and she prepared the couch where I have been sleeping since coming home.

I have been generally in a better mood and has been upset saying that I have not acted this way in all the years she has known me. This has gotten her upset at me.