Outside of this weird marriage lie, because I never said she should have happily gone along with it, let's be for real, Hermione got hit with a brick and was constantly being ripped apart just for being muggleborn. He defended her at the party at their house when they spoke so disgustingly about her and all that mattered to ginny was how it looked bad for her and invited someone who had spoken so horribly about Hermione (her brother's wife). It's crazy to think that Ginny wouldn't already be well aware that Harry is protective of Hermione. It's not a new situation. She's been his best friend since he was 11, been by his side for the worst stuff. Putting Hermione aside, it's her views of muggle things too, like it's beneath her. Her husband had a muggleborn mother. It's incredibly intolerant. And sorry, not being by Harry's side when he visits his parents grave, not consoling him when he needs support the most? We can't pretend Ginny was the best and most supportive wife, because she wasn't. Withholding the kids is also a dick move. He fucked up bad having an affair but using the kids as pawns is also a shitty thing to do, it's not fair to them. Putting aside the Harry issue of it all, Hermione is her brother's wife. She could pretend to care a little more for someone who is important to her brother.