Stepchildren of the late Kim Howe allege Jenner was "negligent" when his SUV hit Howe's Lexus in Malibu, resulting in her death, according to Superior Court of California paperwork obtained by ABC News.
Jenner's Escalade hit Howe's white Lexus, causing the car to roll into oncoming traffic, where she hit a Humvee, according to the L.A. County Sheriff's Department at the time of the crash. The five people inside the Humvee suffered non-life-threatening injuries.
The lawsuit say the two stepchildren suffered "enormous damages and losses" after Howe's death.
Jenner, who was uninjured in the crash, released a statement Feb. 8, the day after the incident, saying, "My heartfelt and deepest sympathies go out to the family and loved ones, and to all of those who were involved or injured in this terrible accident. It is a devastating tragedy and I cannot pretend to imagine what this family is going through at this time. I am praying for them. I will continue to cooperate in every way possible."
Jenner, 65, cooperated with investigators, police said. He passed a field sobriety test and then voluntarily submitted a blood sample to determine whether he was intoxicated.
The L.A. County Sheriff's Dept. is still investigating the crash and Jenner has not been charged.
Jenner's representative declined to comment.