Tina Turner has opened up about her son's suicide earlier this year.
Craig Turner was 59 when he was found dead in July at his Los Angeles home from a self-inflicted gunshot wound.
Speaking to BBC News, Tina Turner said he had seemed fulfilled in both his professional and personal life after finding a new girlfriend.
"I still don't know what took him to the edge," Turner said, "because at that stage he had said to me that he had never met a woman that he felt that way about."
"He was bringing her to meet me [for] his birthday in August. He had decorated his apartment, that I bought him years ago. He had gotten a new job with a prominent real estate company in California, [which] he was very happy with.
"I have no idea what pulled him down, except something that followed him with loneliness. I think it was something with being alone.
"But when I think that, why didn't he call the new girlfriend that gave him the lift?
She added: "He was an introverted person, he was very shy, so I didn't know either, except now when I listen back to our last conversations, I notice a change.
"The last few times we talked, the conversations were different, and I didn't know that until after the suicide."