She swears, if looks could kill, Janet Rockwell would have put her in hospital by now. Thankfully, Janet's husband is always there to smooth everything over, but Martha is worried about her friend Janet. Perhaps she should speak to Mabel Henderson about it.
Her relationship with Roger Rockwell is talked about by many of the residents of Tranquility Lane, but most interestingly, her. If you read Janet Rockwell's diary and pass a speech check, she will vent to you about how Roger pushed her away (because of Janet fighting with him), and she knew there was chemistry. She says she tries to stay away from Roger now so Janet won't hate her even more.
Martha seems to be saddened that Roger denied the fact they had something.