Tori Spelling's sons Liam and Finn Credit:

Brotherly love!

On September 14, Tori Spelling shared yet another glimpse at her fourth child with her husband, Dean McDermott, 45. In the adorable photo (posted on Spelling's official website), the actress' eldest son, Liam, 5, kisses his baby brother, Finn, 2 weeks, on the head.

"Last night Liam was with me in bed while I was feeding baby Finn. I said to him, 'Liam, we need a nickname for Finn. We have Monkey, Buggy and Hattie Cat. What should Finn be?'" Spelling wrote. "He thought about it for a moment and then said, 'Tarantula!'"

Her firstborn's unusual nickname for his younger sibling "made me laugh," Spelling said. "The verdict is still out on a nickname, but now I know what Finn's Halloween costume will be!"

Beverly Hills, 90210 alum Spelling, 39, is also mom to daughters Stella, 4, and Hattie, 11 months, and stepmom to McDermott's son, Jack, 13, from a previous marriage. Since Finn's August 30 birth, the Craft Wars host is realizing how taxing it can be to raise so many children.

"It's not till the moment when you hear wailing cries all at once from voices ranging from 5 years to 2 weeks that you realize, 'Oh, sh-t! I have four kids," Spelling tweeted September 12.