Tonks and Lupin reconcile during her pregnancy; set during Deathly Hallows.
Hermione has had a crush on Bill Weasley for years. But it's his wedding day, and she's in her feelings. Set during Deathly Hallows.
Hermione and Ron explore Hogsmeade alone on Halloween during Prisoner of Azkaban (before Harry had his permission slip from Sirius to go).