means only a few highlights. Since your mom has long hair but her hair will be chopped off. So she will end up having very less amount of hair as compared to what she had earlier. So you can get only a few strands of hair highlighted. For long hair you can do more colouring. But for boycut or mushroomcut. Or something stylish and sexy like what your mom is gonna get, you can get very few highlights. that will look good.