Demi Moore 'Upset' and 'Really Sad' as New Details Emerge on Pool Drowning at Her Home

Demi Moore is shaken by the drowning of a 21-year-old man at her Beverly Hills home on Sunday.

“Demi is shocked and upset by the news. She’s really sad about it,” a source close to Moore tells PEOPLE.

Rumer Willis Shares Sweet Snap of 'Cutest Human,' Mom Demi Moore

First she proudly twinned with her mom, and now Rumer Willis has a new nickname for Demi Moore: “cutest human.”

On Sunday, Moore, 52, grabbed brunch with daughters Rumer and Tallulah Willis at the Beverly Hills Hotel – and Rumer was more than happy to share the moment.

Rumer Willis' Dancing with the Stars Run 'Brought Her Family Closer,' Says Val Chmerkovskiy

Tallulah Willis Channels Mom Demi Moore's G.I. Jane Character (PHOTO)

Like mother, like daughter.

Tallulah Willis shared an Instagram photo on Sunday, showing her channeling mom Demi Moore’s role in the 1997 film G.I. Jane.

Demi Moore Is 'Filled with Love, Pride and Awe' for Daughter Rumer Willis

Demi Moore Didn't Want Rumer Willis to Do Dancing with the Stars: 'My Whole Insides Were Screaming No'

When Rumer Willis told mom Demi Moore that she wanted to do Dancing with the Stars, Moore had an immediate gut reaction.

“My whole insides, I have to be honest, were screaming, ‘No,’ ” the actress said in a taped segment on Monday night’s episode.

Rumer, Scout and Tallulah Willis Shower Demi Moore with Mother's Day Love – and Amazing Throwback Photos

Demi Moore was feeling the Mother’s Day love.

The actress’s three daughters with ex-husband Bruce Willis flooded social media Sunday with an impressive display of old pictures and kind words to honor their mom.

Rumer Willis Poses with Mom Demi Moore, Dad Bruce and Her Sisters at DWTS

Tallulah Willis Celebrates 9 Months of Sobriety

Tallulah Willis seems to be in a much better place.

After cheering on her sister, Rumer, 26, from the audience on Dancing with the Stars on Monday night, the 21-year-old fashionista celebrated her ninth month of sobriety with a hike Tuesday.

Dancing with the Stars: Rumer Willis Breaks Down over Being Bullied for Her Looks as a Teenager