<human>: Give me the gist of the text in a nutshell

This happened a couple of months ago when my grandfather nearly passed away from a flu/pneumonia combo. We were all preparing mentally for him to go because it was BAD. But he went from the ICU to a regular room to a transitional care center and eventually came home. He recovered like the badass champ he is. 

The day we got the definite date for him to come home, my brother-in-law, sister, and I had the following conversation in the car ride back from the facility Grandpa was staying at: 

>BIL: Man, Gramps is so stubborn, he probably saw Jesus extending his hand out to take him but he gave Jesus the finger and said, "FUCK YOU, JESUS!!! You're not taking me!"

>Me: Yeah! When G fell off the roof and refused to go to the doctor's, he was like, "FUCK YOU, ROOF! YOU AIN'T GOT NOTHING ON ME!!!"

>Sister: He fell off of the roof twice and both times he was like, "FUCK YOU ROOF!!! HERE'S BOTH OF MY MIDDLE FINGERS! SHOVE THEM UP YOUR ASS!!!"

And out of nowhere, I hear my five year old nephew say, "YEAH!!! FUCK YOU GRANDPA!!!!" 

My BIL drives a pretty big car and the kids sit in the way back. I didn't think we were talking loud enough for the kid to hear but yeah. Now I make sure to whisper whenever I use profanity in their car.

ETA:
<bot>: BIL, sister, and I were talking about how stubborn and bad ass my grandpa is by talking about how grandpa probably told Jesus to fuck off when he was hospitalized with the flu/pneumonia.