Just a theory, but I'll warn for spoilers just in case.
Because of the time difference between worlds, when she got sent back, a lot of time had probably passed and her parents and friends were probably dead, old or forgot who she was... And she had to suffer and make do on her own. No wonder she doesn't wanna go back. Her son's gonna be middle aged by the time she returns. RIP. Hope those thoughtless assholes repent.