My husband has a catfish account?!

So one of my husbands buddies tried to FaceTime him...my husband is asleep and wouldn’t wake up so I ended the call and let his buddy know, and suddenly a notification from gmail came up. He has a Facebook account with a fake name and is only friends with uhm... very revealing females on there. The account honestly looks like it’s old. But now I’m in my head that he goes on that account to talk to other women. Soooo to test this... I messaged the account. My husband doesn’t know I know about this account. I just sent a wave and said “hi”. If he doesn’t know I know it’s him... he might think I’m trying to flirt with other guys... I guess I’m just curious as to if he’s going to notice but not say anything or if he never even gets back on the account and won’t even know that I ever found this out. I also am scared to straight up tell him because I don’t want him to think I was snooping on his phone when I wasn’t. Ugh.