Dianne Emley
Nan Vining, homicide detective along with her partner, Jim Kissick, and single mom to Emily, in Pasadena, California:

The First Cut (2006)

Cut to the Quick (2008)

The Deepest Cut (2009)

Love Kills (2010)

Written as Dianne G. Pugh
Iris Thorne, an investment counselor in Los Angeles, California:

Cold Call (1993) [revised ed. 2011]

Slow Squeeze (1994) [revised ed. 2011]

Body Blow (1995)
APA: Fast Friends (1996) [revised ed. 2012]

Foolproof (1998) [revised ed. 2012]

Pushover (1999)