My (40m) wife (40f) of 16 years has an ex that has consistently been a problem. The ex will contact her every few years to catch up while subtly insulting myself and our son in conversation while reminiscing on their time together. My wife would respond, ignoring the jabs taken at our son and myself and the memories. The ex attempted to rebound with my wife 6 years into our relationship. She shut him down but continued to leave a open line of communication. I asked her to block him after the disrespect this person has shown and she did. The ex found another outlet to communicate, and my wife omitted telling me until I saw it by accident when she had the website open to show me something. She gave very little acknowledgment to his message in her reply. She then blocked the ex on that platform after my request. The ex resorted to contacting my FIL to relay a message of 'crisis' to my wife, that my FIL delivered to us both at the same time knowing this individual is no good. My wife disregarded it as just another attempt of attention and manipulation and wants me to let it go. I'm not because I am furious. Would I be wrong to contact this person myself with a burner number so they do not have my information, and instruct him to cease any future attempts of contact with her and our family. She thinks that I need to let it rest because he is blocked and will eventually stop.