Bruce Willis and Demi Moore
James Atoa/Everett; Andreas Branch/PatrickMcMullan.com/Sipa
02/02/2012 at 04:25 PM EST
Shortly before Demi Moore split
with Ashton Kutcher
, her previous husband Bruce Willis went to her house to ask her to get help for her worsening health, a source tells PEOPLE in this week's cover story.
"He was worried about her and wanted her to get better," says the source. "Many of her friends did the same thing, but she just wouldn't listen."
Willis, 56, is the father of their three daughters, two of whom – Rumer, 23, and Tallulah, 18 – are now staying with him while Moore, 49, seeks treatment. (Scout, 20, is away at college). Moore had been especially close to Rumer since the marriage collapse.
"It's hard for Ru right now to see her mom in this situation," another source says.
Kutcher, meanwhile, stopped by Moore's Los Angeles house Wednesday, according to X17 Online.
After a trip to Brazil, he is back in L.A. working on Two and a Half Men.
Reporting by AILI NAHASFor more on Demi Moore's health crisis, and how it has rocked her friends and family, pick up this week's issue of PEOPLE magazine, on newsstands Friday