Tori Spelling

Not feeling so great ... Tori Spelling pregnant with fourth child.

Tori Spelling's mother Candy says her daughter doesn't feel so great with her fourth pregnancy.

The reality star conceived her latest child just over a month after having daughter Hattie eight months ago.

But Candy says although she's "thrilled" at the prospect of becoming a grandmother again, she thinks Tori and husband Dean McDermott should have had a bigger gap.

Growing family ... Tori Spelling and Dean McDermott with children, Jack, Liam and Stella.

More on the way ... Tori Spelling and Dean McDermott with children, Jack, Liam and Stella.

"She's expecting on my birthday, September 20," Candy told In Touch. "But it's going to be a caesarean, so she's going to have it earlier.

"She's felt great through all her pregnancies, but she doesn't feel so great through this one."

Spelling conceived just six weeks after giving birth to her third child, Hattie, who joined big brother Liam, five, and sister Stella, four.

"It was a little soon," Candy said. "Her body didn't get back in shape, so I think it's a lot for her."

CM