Well it seemed Tess was being coy. Or was she just evaluating the material? Hiding a blush? Or just very interested? Sheeana couldn't tell with her face hidden behind the papers like that.

As for Katara's expression, she had to wonder if she'd been working on her Prana Bindu quietly in the medbay, because her facial muscles went odd and opposing ways. It was a little startling.

"Katara please give me a little credit. The Avatar is awake, and I already know how much you love him. You are going to memorize these things so your experience of that love physically isn't going to lead to embarassing accidents." This was her being firm. It was her don't-get-knocked-up face. Maybe it was her way of being big sisterly. Or maybe she just thought a pregnancy would be inconveinent.