Demi Moore's marriage to 'Two and a Half Men' star Ashton Kutcher fell apart in spectacular fashion last year -- and now it seems she's on the outs with her three daughters, too.

"There's a wedge between Demi and her girls," a source told Us Weekly of Rumer, 23, Scout, 21, and Tallulah, 18, the actress' daughters with ex-husband Bruce Willis.

So what's the problem? The insider says the girls are tired of "walking on eggshells" around Moore, who went to rehab in February following her split with Kutcher.

Radar Online says the situation came to a head at Tallulah's high school graduation last month, where Moore didn't sit with or speak to her family and even bolted before her youngest picked up her diploma.

"None of the girls wanted Demi there but she turned up anyway and it was really strained," a source says. "They had a huge fight afterward and the girls decided it would be in their best interests to take a break from Demi for a while."

Moore, 49, is now "absolutely devastated" because her girls "won’t return any of her calls, emails or texts," said the insider, adding, "[She's] trying to hold herself together, but this is a really tough time."

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