Snooping causes more heartache and generally we discover more than we bargained for. Unless you are ready to face what may be going on...don't look at the phone records right now.
As for going to his parents...nope, I wouldn't do it. He needs to see and feel what it will be like if you are not in his life as h is wife.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
