Jean Campbell was walking her dog in Cranhill last December when she was beaten to death by an unknown assailant.
And despite a police investigation over the last four months, no arrests have been made.
Edwina O'Farrell, Mrs Campbell's sister, spoke out after the murder of Isabelle Sanders on Wednesday morning.
The 51-year-old was killed by a knife-wielding intruder at her home in Crookston.
Police have arrested a 19-year-old in connection and say there is no reason to believe the two murders are related.
However, for Mrs O'Farrell the appalling crime has brought back all the pain of her sister's death.
She said: "I know the police are doing their best and I have heard they are still doing door-to-door enquiries in Cranhill, so they are not giving up on Jean.
"But it is not happening quickly enough, which has meant another month has passed by.
"Someone must know something or they must have heard something," she added.
"It's still horrendous and I don't think it's something we as a family will ever get over.
"My heart goes out to the family of Isabelle Sanders. It's horrible; why would anyone want to do that?"
BBC Crimewatch is due to air Mrs Campbell's case again in the next few weeks.
She was killed as she walked her dog in Cranhill Park, just yards from her home on December 13.
Her battered body was found at around 7.40am the next day by her husband.