Mrs Weasley uses her words to comfort Harry. She might say things like 'You're a good boy, Harry' or 'You've been through so much, but you're so strong'. Her kind words are like a balm to Harry's troubled heart. She may also share her own experiences of facing difficulties to make Harry feel that he's not the only one and that he can get through tough times too. This long - term emotional support is a key way she shows her care for him.
One scenario could be that Harry has a nightmare about Voldemort. Mrs Weasley finds him trembling and she sits by his side, wraps him in a warm quilt and tells him that he is safe now, that he's part of their family and they will protect him no matter what. She might make him a warm cup of cocoa as well.
I'm not sure of a specific 'Mrs Weasley comforts Hermione' fanfiction off - hand. However, you could try looking on Archive of Our Own (AO3). There are often many well - written fanfics in the Harry Potter fandom. Maybe in one fic, Hermione has a fight with Ron or Harry and Mrs Weasley, being the kind - hearted woman she is, takes Hermione under her wing and offers her some words of wisdom and a warm cup of tea to soothe her.
One scenario could be that Hermione is being bullied by some pure - blood supremacists at Hogwarts for being a Muggle - born. Mrs Weasley, who has always been inclusive, finds Hermione crying in the library. She sits down with her, hugs her tightly, and tells her that her blood status doesn't define her worth. Mrs Weasley might also offer to teach Hermione some of the Weasley family's special spells to make her feel more confident.
There's also a chance that she'll be hurt. Mrs. Weasley has a big heart and Harry ignoring her could really wound her. She might then become more withdrawn herself, focusing on taking care of her own family and leaving Harry to his own devices, while still secretly hoping he'll come around.
Perhaps Harry is feeling a sense of guilt or shame. Maybe he's made a mistake that he doesn't want Mrs. Weasley to find out about, like using a dark spell in a moment of desperation during a battle. So, to avoid her motherly scrutiny, he starts to ignore her. He might be afraid that if she gets too close, she'll figure out what he's done and be disappointed in him.
One possible reason could be that Harry is preoccupied with his own dark thoughts or problems. Maybe he's worried about Voldemort and his plans, and in his distracted state, he unconsciously ignores Mrs. Weasley's attempts to reach out. Another reason might be that he's trying to be independent. After years of being in the wizarding world on his own terms, he might not want to be mothered too much by Mrs. Weasley.
Mrs. Weasley could get a bit angry too. She has a temper, and if she feels that Harry is being disrespectful by ignoring her, she might scold him a bit. However, her anger would come from a place of love and concern. She just wants Harry to be okay and part of the family, and his ignoring her goes against that.
I'm not sure if there is an all - ages appropriate fanfic specifically about Mrs. Weasley and diapers in the Harry Potter fandom. Most official Harry Potter stories don't touch on such a topic in that way. However, the fanfic community is vast, and while there may be some works out there, it's not a common or mainstream concept within the family - friendly areas of the fandom.
I'm not sure if there are specifically popular ones. Fanfiction popularity can be very subjective. What one person likes, another may not. It really depends on the individual's taste for this rather unorthodox pairing within the Harry Potter universe.