Oh, this is easy! It's a favourite of mine (yes, I have a lot of favourite fics!), Momentum: A Winter Holiday Tale by Kathy Brown!

I need few minutes for another good quote...

Quote
"Hi," Lois said briefly. "Lois Lane, Daily Planet." The familiar terse introduction slipped out without conscious thought. To soften it, she added, "I work with Clark."

Martha looked at her sharply for a second, but then Clark stirred, riveting both their attentions. Martha was closer to his head, and she touched him lightly on the face. Lois, further away, contented herself with holding one of Clark's hands and squeezing gently. He remained stubbornly unconscious.
Simona smile