According to stanley, how has blanche acted as a catalyst and changed his relationship with stella?

According to Stanley, Blanche's presence made his wife recall the pleasant days with 'better men'.

Explanation:

In the book, 'A Streetcar named Desire', by Tennessee Williams, the couple Stanley and Stella were attracted to each other but had an abusive relationship. Blanche was sister to Stella, who had experienced a number of tough challenges and now moved in with the couple in their apartment. She is not a straightforward person. She rather prefers hiding her real circumstances and presenting herself to be what she is not.

Stanley believes that things were good with him and Stella before Blanche's arrival. According to Stanley, Blanche's presence made his wife recall the pleasant days with 'better men'. This recollection made Stella view her husband in a different light. Stanley believes that Blanche is not a delicate or mild person and therefore wants her to leave his house. That was why he offered her a return ticket to Laurel on her birthday.