"I have no advice to give, except epidural immediately," Faris joked to Longoria and ET's Carly Steel.
But she definitely had some thoughts on the difficulty of taking Jack to the bathroom!
"I don't know why my mind goes to ... it is, like, the peeing thing," she admitted. "Yes, it is the toilet, it is all over the place and somebody told me to put some Cheerios in the toilet so they can aim... I don't know, it didn't really work. That is all I got."
"And when you are changing the diaper, this crazy things happens -- I don't know if it is because they are relaxed -- suddenly you will get, like, a little fountain right up in your face," she added.
On a more serious note, 41-year-old Faris acknowledged she was still learning as a mother.
In Overboard, Faris plays Kate, a down-and-out carpet cleaner who lands a job on a yacht that is owned by the affluent Leonardo (Eugenio Derbez). Not long after, the two have an altercation that ends with Leonardo throwing Kate's carpet-cleaning machine in the ocean, but he too falls overboard and gets amnesia.
As revenge, Kate -- along with the help of her friend, Theresa (Longoria) -- decides to pose as his wife and fool him into thinking he's married to her and the father of her three children.