About a month ago my wife went clubbing with a group of people I didn't know and didn't get home until 430 am,no problem I've been working eighty hours a week and home only three nights a week and I trust her.Two days after her night out I was finally home and asked about the night out and she would not give me any details just one word answers and she asked our son to not say anything to me about her where she was,I got suspcious and checked her phone records, turns out she didn't make any calls on the night out until the next morning 430 am,8 am and 11am to a certain number ever since she hides this number when she calls it by deleting from her call list more investigating revealed regular calls to this number.Today I found an old e-mail reading ;wanted to send you a quick message to give you a hard(this word underlined)!Still working on it?!?When it's ready let me know and I will take care of it for you!
This man is a client of hers as she is a sales-rep,she closed the letter with, Bye and then her name.

Yes, definately. Deleting the call history and that email are huge red flags. I would advise you to not alert her at this point, keep your eyes and ears open and look for the chance to get hard evidence. The email would've been enough for me to confront my spouse but sounds like you need more. Good luck to you as I know this will be very difficult time for you.

someting is going On, you may want to confront this quickly with as much evidence that you have,is this just started, or how long has it been going on?
she may be feeling negelected and he is filling a void that you are not since you stated you are work 80 hours a week.

possible emotional affair.