All i can think of is, if Kim Dan were to die... Jaekjung would have to tell Dan's grandma...

I thought it was kinda implied the last time they were at the hospital and when they were on the beach that was her passing and the last time they would see her :/ obviously they've not done a funeral and I may be wrong but that was the vibe I had T_T

I think for the majority you are right its the last time they see her alive, but i cant help but feel they'd have a proper scene for her funeral. She is such an important character T^T

I hope they will and I also hope she magically recovers and that I am wrong T_T