It's Complicated:

Her watch completed through the blur of tears. Sam succumbed to the inevitably pain that hit like a punch to the gut, every year.

Expecting her relief, Sam gave a precautionary glance in the Colonel's direction.

He knew something was wrong.

"Carter?"

Not up to diversionary tactics, Sam offered honesty.

"My mom died today. It's been years but I still get emotional. You'd think by now I'd... it's complicated."

Jack understood. He no longer cried; afraid he'd never stop.

Breaking the invisible barrier of rank between them, Jack laced fingers into Sam's.

"It isn't with me."

So Sam simply held Jack's hand and cried.