Vanessa Lachey admits that she is "quicker to snap" now that she is pregnant.

The TV personality and her husband Nick Lachey announced that she was expecting last month.

The hormonal changes in Vanessa's body alter her temperament quite frequently.

Vanessa assures that she doesn't use her mood swings to manipulate Nick into running errands for her.

"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!" Vanessa told host Carrie Keagan on VH1 Big Morning Buzz Live.

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

According to Vanessa, Nick is already taking his fatherly duties extremely seriously.

The singer has been studying a plethora of books on pregnancy and often gives Vanessa advice.

"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 laughed.