Tori Spelling and mom Candy have had very public ups and downs, and on the next episode of Tori's relationship-repair reality show, True Tori, it's apparent that the relationship is currently on a downswing.

At the third birthday party for Tori and Dean's daughter Hattie, a happy occasion becomes volatile when uninvited guest Tatum O'Neal lashes out at an ailing Tori.

News: Tori Spelling Sends Out Cryptic Message

A stress-caused migraine preceded Candy's arrival, with Tori saying, "My mom and I have a really complicated relationship. We see each other when it's appropriate -- for the children -- and they come into play. I don't want them to not see their grandmother. She's a part of their lives. But at the same time, we don't have this relationship where we actively work on anything. We kind of just push it aside, both of us. And there's always an awkwardness."

The awkwardness...