Anyway, Tom's mother clings to her memories of her distant youth as the belle o' the ball, who hosted a steady stream of 'gentleman callers' into her parlor. Unfortunately for her, she married one of those callers, who later deserts her and their two children. Charming.
Throughout the play, she tries to encourage her painfully shy daughter to put herself forward more aggressively by promising her own steady stream of 'gentleman callers.' I guess it's sad that her 'gentleman caller' ends up to be not much of one, but I rather think she's better off without him.