Hermione 's feelings for Ron continue to grow .
Hermione decides to make a move by inviting Ron to Slughorn 's Christmas Party , but Ron romances Lavender instead in retaliation for Ron 's belief that Hermione had kissed Krum years earlier .
Hermione 's feelings for Ron continue to grow and she decides to make a move by inviting him to Slughorn 's Christmas Party , but he romances Lavender instead in retaliation for his belief that Hermione had kissed Krum years earlier .