Patricia Blackmon was 29 years old when she killed her two-year-old adopted daughter in Dothan, AL in May 1999. Debra Jean Milke was 25 when she killer her four-year-old son in Arizona in 1989.
Dora Luz Durenrostro killed her two daughters, age four and nine, and her son, age 8, when she was 34 years old in San Jacinto, California in 1994.
Caro Socorro was 42 years old when she killer her three sons, age five, eight and 11, in Santa Rosa Valley, California in 1999.
Susan Eubanks murdered her four sons, ages four, six, seven, and 14, in San Marcos, California, in 1996 when she was 33.
Caroline Young was 49 in Haywood, California when she killed her four-year-old granddaughter and six-year-old grandson.
Robin Lee Row was 35 years old when she killed her husband, her 10-year-old son and her eight-year-old daughter in Boise, Idaho in 1992.
Michelle Sue Tharp was 29 years old in Burgettstown, Pennsylvania when she killed her seven-year-old daughter.
Franic Elaine Newton was 21 when she murdered her husband, seven-year-old son and two-year-old daughter in Houston, Texas.
Darlie Lynn Routier was 26 in Rowlett, Texas when she killed her five-year-old son.
Teresa Michelle Lewis killer her 51-year-old husband and 26-year-old step son in Keeling, Virgina when she was 33 years old. <snipped> http://crime.about.com/od/female_offenders/a/mother_killers.htm
Here's a list of women who killed their children.
(Makes me so sick!!!)
I couldn't find any cases of step-moms though.
Perhaps as time allows we can look over these cases and see if any took the children to the woods and see if there is a pattern.
Dora Luz Durenrostro killed her two daughters, age four and nine, and her son, age 8, when she was 34 years old in San Jacinto, California in 1994.
Caro Socorro was 42 years old when she killer her three sons, age five, eight and 11, in Santa Rosa Valley, California in 1999.
Susan Eubanks murdered her four sons, ages four, six, seven, and 14, in San Marcos, California, in 1996 when she was 33.
Caroline Young was 49 in Haywood, California when she killed her four-year-old granddaughter and six-year-old grandson.
Robin Lee Row was 35 years old when she killed her husband, her 10-year-old son and her eight-year-old daughter in Boise, Idaho in 1992.
Michelle Sue Tharp was 29 years old in Burgettstown, Pennsylvania when she killed her seven-year-old daughter.
Franic Elaine Newton was 21 when she murdered her husband, seven-year-old son and two-year-old daughter in Houston, Texas.
Darlie Lynn Routier was 26 in Rowlett, Texas when she killed her five-year-old son.
Teresa Michelle Lewis killer her 51-year-old husband and 26-year-old step son in Keeling, Virgina when she was 33 years old. <snipped> http://crime.about.com/od/female_offenders/a/mother_killers.htm
Here's a list of women who killed their children.

I couldn't find any cases of step-moms though.
Perhaps as time allows we can look over these cases and see if any took the children to the woods and see if there is a pattern.