NEVER FEEL BAD for calling your spouse on something you find.
TRUST is a PRIVILEGE... it can be taken away at any time.
If you ABUSE trust you LOSE trust...
The only tricky part is if you were snooping when there was no indicator an affair was happening.. THIS is tricky...
In criminal law you cannot perform a search without good reason or a warrant...
AFTER you catch your spouse though, they have waived any and all rights to privacy after that point.. period... sorry to say, but if you abuse it, you lose it...
No respect for your partner = no trust from your partner...
If you disrespect your partner by having an affair, do NOT expect any trust forthcoming from them... and you have no privacy priviledges -- They are revoked when you are caught cheating...
Privacy is a privilege, not a right... Cheat, and lose it...