Blake Lively is skipping this year's Met Gala, despite being a staple at the annual fashion affair. The actress revealed her plans to stay home last week and, on the first Monday of May, took to social media to reveal what she'd be doing instead of walking the carpeted stairs with her fellow celebs.The mom of four shared a photo to her Instagram Story showing her pumping breastmilk in a bathroom with a sticker added to make it look like milk is pouring out of her chest.«First Monday in May,» she captioned the cheeky shot.Lively previously spoke with ET about not attending the Met Gala at the Tiffany & Co Landmark Reopening event in New York City — her second night out after welcoming her fourth child with husband Ryan Reynolds.«I can't pick a favorite,» Lively said of her Met Gala looks over the years.