_____ is cheating on you

Just opened up my tiktok and saw a message request from a deleted user that says: " xxxx is cheating on you". The account had 0 followers, 0 following, and 0 posts. It was made just for the purpose of sending me that message. He knew my wife's name so it's someone that's on my short list of FB friends or someone that knows her. She's not given me any reason to doubt her in our marriage so far. Should I just dismiss this? Could be somebody just trying to cause harm?