Right from the first sentence this letter is off.
"I won't ever sent this to you because I don't know where you are."
She's not venting privately, she's saying she would send that letter to the ex girlfriend if only she knew where to send it to.
I felt the same senes of unease when I read this as I did when I saw those parents on This Morning saying they would be arrested if they contacted their son again. So instead of leaving him be, they went on national TV and had Philip Schofield appeal directly to a man who had already told the programme he didn't want to take part.
I wasn't shocked at the parents doing that, but I was shocked that PS and TM would go against the son and the police to interfere.
This is the same. This woman can't get to the ex because she doesn't know where she lives, so she's using a national newspaper to have her dig at her sons ex.