This is an absolutely silly thing to discuss on this website. I'm going to try and reason with you, but you have a weird temper and start writing in caps and making things bold. Scary stuff...(seriously, you get worked up over shit like this?!)
Full disclosure: I have no idea who this lady is, and if you asked me to pick her picture out of a line up, I would lose.
As others have said, nobody here knows what exactly has transpired for her to take several months off. This could have been medically necessary...NOT because of the break-up, but it could have triggered a medical condition (depression, substance abuse...I don't want to speculate.)
Just...be happy she's coming back.
Stop trying to figure out why or what caused it.
I know people here obsess over things like that but...take a few seconds, and think to yourselves "does this affect my life in any way, shape or form?" It doesn't? Good. Let it go.