That was quite a touching story, short yet heartfelt. There are only two things I'd like to mention in detail. All in all this vignette was a nice family point of view at saying goodbye to the myth of Lois & Clark.
While I can surely understand your opinion and religion, I couldn't ever imagine that they'd let themselves be split up by hospital policies. Maybe Lois isn't the tornado anymore she was so many years ago but it's hard to grasp that she'd simply accept this without a fight
Also it's very nice to see a change in Clark, he simply accepts his position in life and isn't bothered a bit about the 'time running out'. Some centuries ago he'd probably have beaten himself up about it.