Picture this: a pregnant woman is invited to attend a wedding. She picks out a plunging V-neck dress that lets it all (kinda) hang out, including cleavage and a slit so deep it stops under her belly ...

"Seeing the avalanche of negativity, I was truly in fight-or-flight, but I had to stand up for what I knew to be true," Lively tells PEOPLE One mom-to-be is defending her outfit choice after being ...