Venting

Tw: possible stalking/obsessive behavior/ codependent personality 

So I needed to vent so I took it here, my fiancé's ex girlfriend keeps I guess you can say "stalking" his social sites, because he has blocked numerous accounts on one, and a few more recently. Just last night his ex was found lurking on his social site, on this social site he does not make any posts or share anything publicly unless it's through the direct messages. So putting two and two together, I believe that she was trying to get back into his life. However this is the same person that also told him to "leave her alone" when he caught on to what she was trying to do again, which upset her and they blocked each other. He has stayed true to his word not only as my partner, but for himself. She was a negative person, so he made it known he did not want her back around before blocking. Here's where my problem lies, she is also the same person that was messaging my daughter's bio behind my current fiancé's back. This is not the first time that she has tried this attempt, so I knew from before that I could not trust her. Therefore do not want her in my daughter's life nor mine. The reason why I say she has obsessive personality is because of the numerous accounts that she has made just to reach out to him and honestly I have no insecurities when it comes to her, an I know my fiancé loves me and our daughter, but I'm getting agitated because she does not stay gone and flow through with his wishes. I do not want to be the person that goes into her direct messages like teenager level and confront her an ask her intentions. Any tips would be nice, and some encouraging words are welcomed🥹