Should I ask?

Out of boredom I began going through my fiancé’s email (I know, it’s bad) but I wasn’t really looking for anything, just being nosy I guess. I saw that he actually made his ex the beneficiary for his life insurance policy at work a year before we met. Then about 3 months after we dated he also did the same for me (I had no clue she was listed before) Back then I wondered why he wanted to do it so quickly, but now I’m wondering if it was because he wanted to hurry up and remove her name. Anyway, my concern is the insurance papers she signed doesn’t look like the ones I signed, so I don’t know if it’s another policy she has and if it’s still active, ya know? They still keep in touch here and there so it wouldn’t be too wild to think.. Should I ask him about it? I mean we are getting married soon, we have a child, I think I should know. But then again I found out by snooping so I’m hesitant.