Wendy, I have been waiting impatiently for this installment, and I have to say that I'm impressed. A great piece of writing! I fell apart when Clark started to cry.
I think they hugged to affirm life and comfort them both. It was an attempt to hold on to each other for dear life.
I can't wait to read the next piece!! Please, pretty please with a cherry on top, post soon!!
(One note, though: your "lab testers" are histologists.
)