As a long time poker player, i can tell you that she's almost certainly making a lot of things up. If you don't believe me, i don't have the time to convince you, sry.
Meta: This is a quality of Poker players, that made me recognize I don't have the mental fortitude or stamina to participate in the game, with anything approaching a description of fun.
I suffer from depression/anxiety disorders (treated), and the discipline required to "read the table" is too much for my simple trog brain, to deal with that level of theatrics.
I get so lost in trying to read the table, that I lose track of the cards in my hand, sorta thing, and fail to see the forest through the trees.
The human brain is such a strange organ.
There are some basic functions involved when lying, acting and so on, because this activates reflexes from the childhood.
For example, covering the mouth. Adults tend to put a hand near their mouth, sratching their nose, rubbing an earlobe, fixing their hair...
I read some books about FBI interrogation tactics (i guess you can get this information on youtube for free, nowadays) and also much of the NLP stuff from Anthony Robbins.
I didn't read the table either. Only one or two opponents in the actual hand.
However, you need to watch some easy conversations going on, when the player is relaxed.
When you have to make a move, just start a little conversation, you'll notice if something is off in his behavior.
A test i am doing with my children sometimes:
1. I ask them two or three questions i know they answer straightforward and honest. (Is blue your faourite color?)
2. Then i ask them what i really wanted to know and watch their reaction, eye movement, body posture, speaking pauses...
And, yes, supporting the logic/creative brain hemisphere with looking in the other direction mostly in right-handers. left-handed people tend to look more in the other direction. There's also the vertical tilt, which shows you which kind of thought the person is following: Visual, audible and sensible thoughts, from up to down.
You ask that opening fool-proof question to find out in which direction the person is looking if it tries to support the logic brain hemisphere, also used for memorizing. Most of the time it will be their right (left hemisphere). "Can you remember how the national anthem's melody?" (right-middle) "Remember the opening scene from the movie 'shawn of the dead'?" (right-up), "Remember how bad you felt when your aunt died last year?" (left-down).
Try to play a little with this information, but take care, it's not fool proof. Sometimes the person will think about a projected future of the subject, so the direction will be different. Generally, you can only get a very good hint at somebody's lying when you can spot three or more "tells", at best all at the same time or following closely timed.