Snooping on someone is wrong.
Eric is feeling suspicious over one of his partner's friends who seems to be too friendly with her.
Eric wants to put his mind at ease.
Eric is open about his concerns and brings them up to his partner directly.
Eric goes through his partners devices to check if anything is going on.
Eric's partner feels bad that he was uncomfortable and reassures him.
Eric's partner finds out what he's doing and feels her privacy has been violated.