I (28F) walked in on my husband (30M) of 5 years kissing his coworker?

Hello! <br><br>My husband of five years, Bob, works as a project manager for the same company where his best friend, Rick (33M), works. Two years ago Rick suggested Bob hire a new employee, Samantha (26F) to work on their software projects. <br><br>Samantha initially didn’t have much experience in the industry but Bob was always eager to help new employees and give them opportunities. I had met Samantha several times but never felt a bad vibe from her.<br><br>Last month, I happened to be in the area around lunchtime and thought it would be great to surprise Bob with a visit. When I arrived at his office, no one was at the front desk, so I decided to go straight to his room. When I opened the door, I saw Bob and Samantha kissing. I was completely shocked. <br><br>After that incident, I decided to investigate Samantha’s past and discovered she had previously worked for Rick's company. I couldn’t help but wonder if Samantha had been specifically recruited by Bob and Rick to be a "perk". I think Bob cheated on me with Samantha. Now, I'm considering divorcing him.<br><br>Should I confront him about this? Or should I hire a private investigator? I'm so confused right now.<br><br>Also, for anyone wondering, this is a throwaway account my real account is linked to our joint Facebook account where we've added each other as spouses.<br><br>UPDATE PLEASE CHECK THE NEW POST I MADE FOR UPDATE!