Exploring the People of Middle-earth: Lobelia Sackville-Baggins, an Unexpected Hero.
… Lobelia is one of only a few Hobbit women who are given more than a momentary glance in Middle-earth, and a compelling character in her own right. And what’s more, her narrative arc illustrates beautifully some of the more important lessons The Lord of the Rings has to teach, as she becomes an unlikely hero to those who had consistently refused to give her a chance.
This will only make sense if you have read the books. Peter Jackson did not include the Scouring of the Shire in the film version of The Return of the King.