I'm writing a story in first person. There's a point in the story where two characters are having a dialogue, while the narrator is listening. The problem is that the narrator is also in pain while this dialogue is occurring (think super-villain explaining their evil plan while the hero is injured). There are also a few points where the narrator asks questions during the dialogue, although these questions are very short.
The dialogue is actually pretty long -- it's about two pages in length. The dialogue needs to make it into the story -- it contains important information for the audience.
What's a good way to multitask and convey that the narrator is in pain, while also including the dialogue in its entirety into the story?