Just wanted to mention. My mom used to be married before she wed my dad, and she left her first husband. No arguments, but when she told me the reason, well, I’d do the same in her shoes. From what I understand, he still loved her but she totally moved on, including geographically.
On her 50th birthday, a phone rang in our flat, I answered. The guy knew my name. He asked for my mom, I called her. Basically, it was her first husband, now an ex, calling eons later to congratulate her. She was very polite (but not super happy), thank you, the same to you, good-bye.
What I want to say: Monique likely had no contacts with MM, but it doesn’t mean that she expected him to be a menace. Just knew that she was, and remained, the biggest love of his life. When/if he’d call, it would be probably mildly irritating. I honestly don’t think they had any contacts, but she probably never expected him to be a menace, just a guy who hadn’t fully “gotten over his love for her”.
What I mean is: it was her past, but if she heard that he expressed interest in her, she would not necessarily view it as “stalking”. Just “he hadn’t moved on” yet. Many people accept existence of someone who may still love them but not expect anything seriously bad from it. Just “he was very smart, and he really loved me, more than I loved him”.
I wonder if she viewed him more as a nuisance in her life hence she took no additional precautions because she, mentally, moved on.