It's not that complicate... it's just...
9 parts Complete Hermione has found a girlfriend after the war, and after she had broke up with Ron... Julia was a nice woman, working in the Ministry like Hermione, and they had started dating, and they also had started something that was close to a relationship... very close, but after Julia had lost her Job, something changed...
During the wedding of Draco and Harry... well afterwards, she found herself in a situation she doesn't wanted to be in, but at the same time, she couldn't think of another person to be in, in this place at that very moment... it was the same person, she had watched for four years during the anniversaries in the Ministry for Magic... too stubborn to talk to each other...
Can one talk be enough?!