She looks cross, and possibly sad, but the back of her chair reminds me of the back of II- La Papesse, the same light blue, the colour of the Madonna's dress, a spiritual colour, associated to motherhood. The pillars of her chairback also remind me of the scroll-like wings or pillars on either side (but just behind) of the Papess. She looks in the same direction as the Papess, towards the past. Is she regretting her girlhood?
She rests her hand on her pregant belly the way you smetimes see mothers-to-be do. An instictive protective gesture.
To me she is an embodiment of Kipling's verse "the female of the species is more deadly than the male". Because she has a deep knowing, that comes from her sharp mind, from her incipient motherhood; and something you can read in the lines of her face: a kind of wary, proud suffering, that would not exclude understanding, even though you know she would not hesitate to use that sword if she had to. She is deep in thought, and has let her sword slip a little from its upright, ready position (Rusty Neon remarked on the position of her sword in another thread, and compared it to the Justice card).
I don't know why, but am reminded of the character of Eowyn in the Lord of the Rings - fierce, clever, brave, proud, but warm and loving underneath, with a strange spiritual link to her sword. Resentful that she is not a man, too. She was brought up among men and looks down on woman's work. I think if Eowyn were pregnant she might look like this.
In a reading? I like tmgrl's single mother. But also: a time of knowing and wariness, a time for the querent to be closer to herself (and her baby for pregnant women), than to others. A time of mental preparation for a big change or challenge, that includes some difficult moments. She could also indicate a Daddy's girl, someone who was desired as a boy, but was born a girl; she might have been brought up as a boy by her father, despise her mother and has a secret desire to be a man (Margaret Thatcher looms in my mind). Someone who might even repress her feminine side until nature makes her take notice by making her a mother. I wonder if she is not a little resentful of her pregancy? And once she has children, she might prefer her boys.