Nancy Kemeny told The Daily Telegraph her daughter had gone to the clinic in California but returned to London because she was worried about her husband. Her body was found Monday after her husband was picked up for erratic driving, and investigators say she may have been dead for as long as a week.
"They were getting ready to go," Kemeny said. "Her husband had his passport and they were getting ready to go back to California. We had high hopes."
Eva Rausing's father is a retired Pepsi Cola executive, while her husband, Hans Kristian Rausing, is a member of the Swedish family that controls the TetraPak food processing conglomerate.
The Daily Mirror reported that Eva Rausing's family had hired a group of former soldiers in the elite British SAS special forces to try to keep her away from drugs.
"We followed her covertly for as long as possible until we knew she was about to buy drugs and then we would disrupt it by beeping horns or walking up to the car and staring," one man said. "Most times the scum who were selling the stuff were terrified and drove off."
The man said he and the others in the unit would sometimes call police and tell them they were watching a drug deal. But he said there were limits to what they could do.
"The aim was to protect Mrs. Rausing from herself," he said. "But we couldn't physically stop her going out at night."
Celebrity Breakups and divorces of 2014 [PHOTOS]