~Expression~
The moment he saw the expression, he knew something was wrong. The muscles in her face moved differently from his and his brothers'. The others seemed oblivious, sometimes, a fact that never ceased to amaze and amuse him. He, the gruffest of the four, could sometimes read her better than the naturally observant scientist, or the emotionally sensitive youngest. Even the Leader, with his constant attention to detail, sometimes missed the subtleties of her moods.
He almost asked, but the presence of his brothers stopped him. Appearing too attentive would lead to teasing. He had a reputation to uphold, after all, and appearing to understand women, well, that would be almost too much to bear. After a moment's consideration, he reached out and bapped the back of the youngest's head, eliciting a startled yelp of protest. He smirked as he saw the tension melt away into laughter.
He caught his father's approving nod from the corner of his eye. Amazing, how their Sensei always knew exactly what his sons were doing at any given moment. He'd learned observation from a true Master after all. He snagged a piece of the dwindling pizza and settled back, content to enjoy the moment.
A/N: The prompt was "facial expressions", and was linked to a fascinating book, a collection of facial expressions for artists. I picked one, and went with it. He surprised me by taking over, and those surprises are often my best writing. :)