Well, Atris still did have a love or care for the Exile.
In the Revan novel, Atris is quite cutting towards Revan because of what the mandalorian war did to the Exile. So it could just be that she (obviously) didn't get out much and spent a little too much time around those sith holocrons.
Still, it doesn't make her any less of a bitch for endagering the Exile to draw out the sith.
"I wasn't counting cards, I was cheating."
"Ugh. you give me hives."
"It's Tee-revor time!!!"