Blocked Friend Request on My Wife's Facebook

I was chatting with some coworkers when the topic of trusting spouses came up. I mentioned that I have no reason to distrust my wife. In reply to one of my colleagues, I confidently stated that I could check her social media and I’d bet there wouldn't be any inappropriate content. Later that day, curiosity got the better of me, and I decided to look at her Facebook. We share our passwords, but I had never logged into her account before. As for my own, I rarely use it, so I doubt she has accessed mine. My wife has a few male friends from high school, and I’m completely fine with that. They rarely communicate, probably just keeping up with updates about each other’s families. We both naturally moved away from friendships with the opposite sex once we started dating and eventually got married. When I logged into her Facebook, I noticed she had a friend request from a guy who used to flirt with her back when we were in high school. He lived across the street from her, which is how they became friends, but she never dated him. As far as I know, she briefly went out with his brother in middle school. This guy had no problem flirting with her even though we were together, which really upset me. He was known to be untrustworthy, having cheated on a girlfriend before. I thought about confronting him back then, but the timing never felt right—I would only see him as my wife and I walked to class, and she would usually just walk away when he flirted. I've always felt uneasy about him reconnecting with her. Out of dislike for him, I deleted his friend request and blocked him. Even though I trust my wife, I didn’t want that person lingering in her mind. She might have eventually deleted the request herself, but it’s also possible she was just curious to see what he was up to. I should have either let her handle it or talked to her to explain why I was on her account in the first place. She might have had that request pending for a long time or just a day. If I brought it up with her, I’m sure she would have ignored the friend request out of respect for my feelings. She’s great like that. However, I didn’t want to start a conversation about it because she’s been dealing with a lot of stress lately, so I figured it was best to let it go for now. I thought about unblocking the guy and letting her deal with any situation that might arise, but I felt it would be better not to create an opportunity for tension. This could lead to a conversation if she accepted the request, which might add more stress to her life. I feel guilty about my initial action, but right now, I’m just contemplating moving forward. If she notices the block later and asks about it, I’ll explain everything then. What do you think? If you were in my shoes, what would you have done?