Mary Cuevas died when the vehicle she was in flew over an embankment along the 91 Freeway and landed upside down.
Miguel Medina Delgado Jr. - one of her sons - spoke with Eyewitness News on Friday and said he and his brother were following their parents when they saw the car lose control and crash in front of them.
He said he and his brother must live with the nightmare of knowing they witnessed their mother's death.
"There's not going to be another day when I can see my mom," said Delgado. "She was the best that could ever happen to me."
"As soon as it happened, we pulled over and we were like, 'No, no, no, no,'" he added.
Miguel said by the time rescue crews arrived, his mother had already died and their father was left critically injured. He's been in the hospital since the deadly accident.
"It's devastating," said Ivan Medina Delgado, Cuevas' other son. "Too traumatic to think about seeing your own mother dead."
The brothers said their mother was a pillar of the community in Compton for years, feeding and clothing the less fortunate and teaching her children to love all of God's people.
"She would always try to her best to feed and clothe and do everything for people help them out, give them a roof to stay in," said Ivan.
As families get together this Labor Day weekend, the Delgado brothers are encouraging people to hug and love their loved ones, understanding that each second with them could be the last moment shared.
"We will not be seeing them ever again, until we meet again," said Miguel.
The brothers said their mother will be laid to rest at the Calvary Cemetery and Mortuary in East Los Angeles.
A GoFundMe has been created to help with funeral and medical expenses.