My Wife Uses a Vibrator, is it normal?

Just found out that my wife uses a vibrator, is that normal? A few nights ago, I was in the shower and heard something strange coming from the bedroom. My wife didn’t even know I was home, but I heard buzzing and moaning. I guess you could say I caught my wife using a vibrator… akward.. we’ve been married for 7 years, I don’t know why she never told me about this or even how she hid it from me for so long…

Is she happy with me? Does she like this vibrator more than me?