juanhead: what you are describing is a 'front squat'. it's easier to get a deeper squat with a front squat, and you can keep a more upright posture; however, she is not "squatting wrong". what she is doing is traditionally called simply a 'squat', AKA a 'back squat'. back squats are more effective for developing hip power, which is the center of power for your entire body. they are also more effective for strengthening your posterior chain (glutes, lower back); front squats are more quad dominant. nothing wrong with either exercise, but back squats are generally recognized as building a more powerful base for you to work off; remember, you can't launch a cannon from a canoe. ps if your trainer tells you that back squatting is "wrong", maybe you should get a new trainer...