Nick Gordon had argument with Kristina before bathtub incident

Los Angeles: Singer Bobbi Kristina Brown had an argument with boyfriend Nick Gordon the night before she was found unconscious in a bathtub at her home two months back, revealed his mother Michelle Gordon.

Michelle opened up on th talk show "Dr Phil" about the events leading up to Brown's bathtub incident on January 31, sharing intimate details about the night before, reported Us magazine.

Gordon's mother told Dr Phil that her son, 25, and Brown, 22, had partied with a pal on the eve of the incident, returning to their home early Saturday. It was then that their conversation got heated, Michelle explained. "Nick walked away from the argument. He went to another bedroom to fall asleep." Kristina "went up to her room and drew a bath."

The couple's friend Max Lomas found Bobbi facedown and unresponsive in a bathtub after the cable repair man said he needed access to her room. Lomas called out to Nick, who then administered CPR on her until paramedics arrived on the scene.

"Nicholas was able to do the CPR on her for 15 minutes," his mother shared. "The police arrived, and they didn't help him. No one helped him until the EMTs got there."

Nick has reportedly been grappling with guilt ever since the incident, turning to alcohol and drugs to help cope while Bobbi Kristina remains in a medically induced coma at the Emory University Hospital.

"He has blamed himself for the condition she's in," Michelle said on "Dr Phil".