Ron's immediate reaction at being hugged like that was to go "Gerrof!" like he always did when Molly went on full mother mode, but being addressed as uncle made him stop, his complaint turning into a muffled "Grfm!"
Okay, he thought to himself, another niece, and one that just arrived. "Victoire?" he asked with some hesitation, remembering recent events. He didn't speak to his eldest niece much in the past, except when Kitty had been born and he went to visit - and she had been older by then.
At the mention of Hermione, he couldn't help but grin. "Yeah, well, she's the same, so I reckon she's okay with it."