She was disinherited by her own father, Hollywood legend Tony Curtis.
Now Allegra Curtis is talking for the first time about the anguish she and the rest of her family are suffering.
"We were all blindsided and it was very painful," said Allegra.
INSIDE EDITION revealed earlier this year that Curtis cut his five children, including movie star Jamie Lee Curtis, out of his will.
Curtis left the bulk of his estate to his widow Jill, 42 years his junior.
But Allegra told our Les Trent that she's not buying it.
"It's written there but I don't believe that was his last wishes," said Allegra.
"Why did he write it, do you think?" asked Trent.
"I believe he was influenced, and we all know who he was influenced by. I don't need to say her name," said Allegra.
While Allegra was adamant about not naming names, court papers filed by her sister Kelly said Curtis's decision to disinherit his children "Is a result of duress, menace, fraud or undue influence by Jill Curtis and/ or others."
Allegra says being disinherited by the father she adored was devastating.
"I felt like I didn't have the right to exist, and he loved me very much, and I loved him. That's why I believe it didn't come from him."
Allegra is Curtis's daughter from his marriage to the actress Christine Kaufmann. He had five wives, including movie star Janet Leigh. Jill Curtis was married to the star for the last 12 years of his life.
Adding to Allegra's distress, Jill is auctioning many of Tony Curtis's possessions in Los Angeles. Among the items is Curtis's famous jacket and cap from his 1959 film Some Like it Hot.
"Tony was very specific in his wishes," said Jill.
Jill says Tony informed his children they were being disinherited.
INSIDE EDITION's Jim Moret spoke to Jill at the auction house, Julien's, and asked about Tony Curtis's relationship with his children.
"Tony could have a difficult relationship with his kids, but that really was between them and their dad, it had nothing to do with me," said Jill.
But Allegra says five of Tony's grandkids got a total of just $30,000 each, and Jamie Lee's two children got nothing.
Allegra fears that her father's will may sully people's opinions of the great Tony Curtis as a family man.
"He was a loving, fun father. I think he wanted to make sure we were all taken care of," said Allegra.