I don't know your sister but maybe therapy worked for her. Maybe her therapist helped her find happiness in those "little things" that seem to bother you.

You admitted your mother was an alcoholic and perhaps she is no longer playing "lets pretend mom's the best."

I'm not trying to be rude but maybe your sister is trying to grow up. Maybe she did and has changed her mind on her studies. If not~ I wish her the best.

Hoorah for your Therapist agreeing with you!

I do know that if my sisters couldn't accept me for who I am ~ I'd leave respectable messages as well.