I believe your wife is in the throes of an affair. You seem to be discounting that issue. It would explain her behavior, her new phone, her up and down emotions etc...
Also, You may want to do some deep investigative work on these "so called" trips to see her parents. She had one on Thanksgiving and now one after Christmas? These are always red flags when a WS is in an affair. ESPECIALLY when they have to FLY out of town. They use the parents or friends as an excuse to take a trip and tell the BS they are visiting friends or family.
I susect that she is having a rendevous with the OM.
Don't buy this without investigating. You are burying your head in the sand if you don't see huge red flags here. She may certainly be staying or seeing her parents, but I wouldn't be one bit surprised that there is something else going on with these trips away. Don't fall for that.
