Aileen Shepherd and Senator Janet Getzloff were sisters. Aileen is the mother of the late Gary Shepherd and Senator Getzloff investigated charges of malfeasance in the Organized Crfme Bureau.
The difference in their names has an easy splainin - at least Aileen Shepherd used her married name. It's unknown if Senator Getzloff was married, and the use of "Ms." as her abbreviated honorific leaves the question up in the air. So it could be the Senator is using her maiden name, which would mean Aileen was Aileen Getzloff before she married Gary's father.
Both women were played by Georgeann Johnson.
Two for Tuesday!