The Question and Answer section for A Streetcar Named Desire is a great resource to ask questions, find answers, and discuss the novel.
Blanche hasn't had a good life. Her family wealth and estate are no more, Her husband committed suicide, she has a drinking problem and people generally think she is promiscuous.
Blanche tells Mitch that she is younger than Stella.
Blanche accuses her sister of having abandoned the family home and of having left her (Blanche) to survive on her own.