Disclaimer: I'm NOT JK! I do not own the characters!
Dom did not enjoy Sunday lunch at the Weasley-Potter household, and would have much preferred to have lunch with her mother's family.
That sounds bad.
It wasn't that Dom did not enjoy the company of her father's family, she loved all of them; it was just that none of them really understood her. Not really. None of them really got Dom; not her dad, not her Uncles George, Charlie and Percy, none of her cousins, not even her Aunt Ginny (whom she looked the most like). No. The only person, who truly understood her, was her mother's sister, her Aunt Gabrielle. She was the only person who truly understood what it was like to be Dominique Weasley; because she was just like her.
At Hogwarts, the first person to approach her asked her if she was Vic Weasley's sister; and when she replied; 'yes', that's who she became. She wasn't Dom Weasley anymore; she was Victoire's younger sister. She was constantly being compared to her sister, passed over for her, and told she would never be as good as her. Her family were the worst for making comparisons, even if they didn't mean to. Many a summer her dad would ask her to look at Victoire's work and expect her to compliment it.
The worst time, was when she fell in love. His name was Teddy Lupin, and he had basically been adopted by their family as an extra cousin. Dom didn't mean to let her guard down, but he was so nice to her, so kind. He never compared her to Vic, never told her she could do better and he never said that Vic was more important than her.
She decided to give in and ask him out when she was in fourth year. They were in a corner of the common room; he was looking over some of her essays for her. Vic was slumped on the rickety armchair on the other side of the room, the rest of Gryffindor house were at the Quidditch match. She asked him; "Would you consider going out with me?" He replied no, quite abruptly. When Dom asked him why, he replied, a little more gently; "You're not Vic."
That broke her heart.
Her Aunt Gabrielle was most like her and understood her best, because she knew more than anyone else how it felt to be passed over for your sister.