She's persistent -- that's the fourth letter in three months asking him to reconcile. Add it to the phone calls and the emails, and the personal visits to his office ... she's close to obsessed. Which is just where she should be at this point in the profile.
It only took him six months to get her attached, and with luck it will only take six to drive her insane enough for her friends to believe she killed herself. Just a year, and we'll have her inside -- excellent timing. No one writes a profile like Madeline.