Diana Lively, 28, didn't expect to receive negativity online after choosing a dress that made her feel "beautiful, confident and comfortable." "Being pregnant — as I’m sure some other moms-to-be can agree — I often find it difficult to simply choose something to wear," she tells PEOPLE. The dress, showcased in a series of TikTok videos, is light purple with a deep V-neckline, revealing some of her cleavage and growing baby bump. In one of her videos, Lively described it as "the best maternity, non-maternity dress on the market." "The first wave of comments came from mutuals on TikTok — both from my personal and online community," Lively tells PEOPLE.