Yesenia (Ochoa) Olaez, 33, was in the process adopting her nephew, Brian Gonzalez.
The 11-year-old spoke at a vigil Sunday about how much he was looking forward to being raised by his aunt and getting out of the foster-care system.
"She was a loving mother," Gonzalez said. "I feel like her time was way too short. Although I do know she died peacefully and she died loving me. I wanted her to see me grow up."
Yesenia's boyfriend now says he is going to fight for custody of Gonzalez.
3 women killed, driver arrested for DUI after violent crash in Pomona
The violent high-speed crash happened Saturday around 11 p.m. at White Avenue and Phillips Boulevard as Yesenia and four others were coming home from a baby shower.
The driver of the SUV that slammed into their vehicle, identified as Victor Siharath, 36, of Pomona, was arrested for felony DUI. His bail has been set at $430,000.
Witnesses reported seeing him run a red light right before the collision.
The other victims who died were identified by family members as Lorena Morales, who was driving the vehicle, and Alejandra Olaez, 33. The baby shower the group was attending was for Morales' granddaughter.
Juan Manuel "Jaime" Garcia, was the front-seat passenger and the husband of Lorena Morales. He was transported to a hospital in critical condition.
In the backseat was Noemi Olaez, the daughter of Alejandra. The 12-year-old girl was also hospitalized in the intensive-care unit.
GoFundMe pages have been established to help the families of all three women who were killed:
Yesenia Olaez.
Lorena Morales.
Alejandra Olaez.