RE: My Girlfriend
A good balance of compound exercises for legs, cardio and good diet is the simplest way, easier said than done tho! Get used to using fixed machines first before she trys anything too technical and so she gets used to the feel of pushing weights, then when she sees how lifting a decent weight can shape her body and legs she wont be frightened to push herself. Hopefully shes not of idea that 'if a woman lifts a weight and feels it she will wake up looking like Arnie'?!?! Its just not that easy, but to shape and tighten her legs, the muscle will respond best to effort and intensity. The cardio and diet will help control body fat levels.
PS Stay away from multiple sets on the adductor whilst reading Bella magazine!!