Demi Moore missed her daughter Scout's graduation on Sunday (26.05.13).

The 50-year-old actress, who is in the midst of a bitter divorce from Ashton Kutcher, was reportedly expected to watch her middle daughter receive her degree from Brown University, but did not attend the ceremony or the 21-year-old student's family dinner to celebrate afterwards.

A source told gossip website RadarOnline.com: ''The buzz was that Demi was supposed to come in, but everyone was wondering where she was. She was nowhere to be seen all weekend, but everyone seemed to be having a perfectly good time without her.''

Demi's ex-husband Bruce Willis attended the event with their other two daughters Rumer, 24, and Tallulah, 18, as well as Rumer's boyfriend Jayson Blair.

The family proudly posed for photos alongside Scout and Bruce's wife Emma Hemming, who spent several days in Rhode Island, Providence before the event.

An insider said: ''Bruce was spotted all around town starting on Friday (24.05.13), shopping and eating out with Emma. Everyone was wondering where Demi was.''

Demi's relationship with her daughters was previously described as fragile despite their recent reconciliation, after they reportedly froze her out because they were fed up of her constant partying following her split from Ashton.

A family insider explained: ''Demi and Rumer have been working on repairing their relationship.

''But the problem is that Demi wants to go out and party with her again and that is where all the problems started before. They're apprehensive.''

The girls are said to be still worried about Demi, who has recently been linked to 30-year-old commercial pearl diver Will Hanigan.

The source said: ''Demi's girls are really apprehensive about letting their mother back into their lives. They want her to be totally over Ashton and healthy.''