Naruto would probably be extremely hurt at first. He values friendship and loyalty a great deal, so Anko's betrayal would be a huge blow. But he wouldn't give up. He'd likely try to talk to Anko to find out why she did it, hoping to change her mind.
Perhaps Anko is jealous of Naruto's growing power and influence in the village. This jealousy festers and she decides to betray him by spreading false rumors about him collaborating with the enemy. Naruto then has to deal with the villagers' turning against him while also trying to prove his innocence and find out why Anko has turned on him.
Naruto would likely be extremely hurt. He trusts his friends and comrades deeply, so Anko's betrayal would be a huge blow. At first, he'd probably be in disbelief and try to talk to Anko to find out why she did it.
Perhaps Anko is trapped in a genjutsu and Naruto uses his own experience with breaking free from illusions to save her. He could sense her distress and use his chakra to disrupt the genjutsu, freeing Anko. This would show Naruto's growth and his ability to help those in need, even a more experienced ninja like Anko.
One challenge could be the reaction of the village. Since Naruto is a well - known figure, the news of him impregnating Anko might cause a stir. There could be rumors and gossip that they would have to deal with.
It could be that Anko is under some sort of mind - control in the fanfiction. And because of that, she attacks Naruto without really meaning to. Maybe she has been influenced by an enemy's genjutsu. So, she uses her powerful attacks on Naruto, and he gets hurt as a result.
Well, it could start with Anko being given false information about Naruto. Let's say someone convinces her that Naruto is secretly working with an old enemy of Konoha. She then starts to spy on Naruto. As she does this, she uncovers some things that seem to confirm the false information, but in reality, they are just coincidences or set - ups. So, she feels she has no choice but to betray Naruto to protect the village. It could also be that Anko has her own ambitions that conflict with Naruto's goals for the village, and she sees betraying him as a way to achieve her own ends.
He could be betrayed by a false friend in the DxD world who spreads lies about him. For instance, telling others that Naruto has a hidden agenda to take over their realm.
In some Naruto fanfictions, Anko might be depicted as cheating on Naruto, but this is not part of the original Naruto storyline. Fanfiction allows for a lot of creative and often non - canon interpretations of characters' relationships.
The relationship would be an interesting blend of two very different personalities. Naruto is often upbeat and optimistic, while Anko has a more edgy and somewhat cynical side. However, they would balance each other out. Naruto would bring out the softer side of Anko, and Anko would keep Naruto grounded. They would have a deep emotional connection based on shared experiences and a growing love for each other. For example, Naruto might share his dreams of a better future for the village with Anko, and she would offer her own insights and experiences to help him achieve those dreams. And in their private moments, they would have a very affectionate and understanding relationship.