Nick Lachey and Vanessa Lachey on March 30, 2012 in Sydney, Australia. Credit: Don Arnold/WireImage

Vanessa Minnillo is planning to milk the emotion-filled journey of pregnancy -- and her husband Nick Lachey better watch out!

When VH1 Big Morning Buzz Live host Carrie Keagan asked the star if she was using her pregnancy mood swings to make Nick run errands, Minnillo, 31, answered, "I'm not using them as excuses to make him do stuff, but I am using them as an excuse as to why I'm such a b-i-t-c-h sometimes!"

"I'll snap and them I'm like, 'Oh honey, it's the baby,'" she admitted, with a laugh. "I'm a little quicker to snap, but I'm also quicker to apologize. He has been a gem!"

The Summer Wipeout host reveals that Nick is already an active father -- the first-time daddy-to-be is reading the "man version of the book," to understand what Vanessa is going through.

"I'm only five months in and he's like 'Oh, it gets worse,' Like six, seven, eight, nine I'm apparently supposed to be a complete basket case!" she said.