Never give up your source of intel but also...don't drive yourself nuts evaluating the intel every day. I'm speaking from personal experience...
I found out my wife was having an EA with a guy. In all honesty I had NEVER checked her phone records until she lied to be about where she had been one afternoon. That prompted a perusal of her phone records and that's where I found multiple texts to this guy on a daily basis. I drove myself crazy checking and re-checking her phone logs.
My final conclusion: I know. She knows I know. Why torture myself? I can still pull up records any time I want (or need) to but why drive myself crazy?
Move on...get a life. Protect your source of intel should you need to go "ugly" at some point in time.