Don't be surprised that if when you do decide to confront her, she's going to blame you for invading her privacy, how dare you, blah blah blah. Keep all these records and give them to your L. You'll now be thinking about whether or not you should get full custody of the kids. If you do plan to confront her, DO NOT do it in a demanding, how dare you kind of way. It is going to be hard as hell. Just say it very matter of factly and that you will be coming by to collect your kids so that she can pursue her A in the open and they are not a burden to her any more. You can't control how she feels and she is going to fight you tooth and nail about it.
CIPA...man, I'm sorry! It amazes me that cheating spouses are able to justify to themselves that their cheating is OK! It's the meanest, most thoughtless, uncaring thing that one person can do to another...short of murdering them!
Stuck is right. She's gonna be pissed that you 'invaded her privacy'...don't let her go there! The issue here is her cheating on you...it's not about you 'invading her privacy'! Don't let her get you off on that tangent. Stay on track...she's cheating! That's the issue! Period! Pay particular attention to what Stuck said about not being demeaning when you confront her...he's right! It'll be hard...but don't do it. He has given you good advice here...follow it! I'll have some good thoughts for you, man. Again, I'm sorry.
"Always go straight forward, and if you meet the devil, cut him in two and go between the pieces." - William Sturgis, clipper ship captain, 1830's.