One scenario could be that Harry is overly protective of Ginny after the war. While it may seem like a good thing, Ginny is a strong - willed witch. If Harry starts treating her like she's fragile and tries to limit her activities, she would get angry. For example, if he doesn't let her participate in certain dangerous but important magical tasks because he's afraid she'll get hurt. Also, if there are rumors or false accusations about Harry in the post - war wizarding world, and he doesn't share them with Ginny right away, she might be mad that he didn't trust her enough to confide in her.
A third scenario could be jealousy. If other witches start showing interest in Harry and he doesn't immediately and firmly shut it down, Ginny might get mad. She is a proud witch and doesn't want to share Harry's affections, and his seeming indecisiveness in such situations could lead to her anger in fanfiction.
One possible reason could be that Harry was away a lot after the war, dealing with the aftermath and his newfound responsibilities. Ginny might have felt neglected. Maybe she expected more time together, but Harry was constantly occupied with things like helping to rebuild Hogwarts or being involved in the Ministry's new initiatives.
In some fanfictions, they might go on adventures together. Exploring the wizarding world more fully, perhaps seeking out new magical creatures or ancient magic. They have a thirst for discovery after the chaos of the war. Harry's knowledge and Ginny's courage would make them a great team on these excursions.
In some fanfictions, Ginny might be mad at Harry because of a misunderstanding. For example, she could misinterpret his actions towards another girl as being unfaithful. Maybe he spends a lot of time with Hermione on a project and Ginny thinks there's something more between them.
One scenario could be that Ginny has prepared a special surprise for Harry in the common room. She has decorated it with floating candles and their favorite flowers. When Harry enters, she plays a soft, romantic song on her wand - charmed radio. They then slow - dance under the candlelight, lost in their own world.
One possible scenario could be that they meet in the ruins of Hogwarts. The war has just ended, and there's a sense of relief and newfound hope. Harry spots Ginny among the crowd of survivors. Their eyes meet, and without a word, they rush into each other's arms and share a passionate kiss. It's a moment of pure emotion, a celebration of their survival and their love that endured through the dark times of the war.
One scenario could be them simply having a picnic by the lake near Hogwarts. They talk about their future, like Ginny planning to play Quidditch professionally and Harry thinking about becoming an Auror. They laugh at how normal it all feels after the chaos of the war.
It could be due to jealousy. Perhaps Ginny has been spending a lot of time with another character, and Harry misinterprets their relationship, leading to his anger. In fanfiction, the writers often play with such emotions to create drama.
She might be hurt at first. Since she's pregnant, her emotions could be more fragile, and Harry's anger could really sting.
One common scenario could be Ginny flirting with another boy in front of Harry. For example, she might dance with a popular Quidditch player at a Hogwarts party while Harry watches. Another could be Ginny getting a lot of attention from an older student for her academic achievements, and Harry starts to feel left out and jealous. Maybe Ginny is also asked to be a partner for a special project by someone other than Harry, and she seems really excited about it, which makes Harry green with envy.