They end up stripping their own color out and then they don't understand why it doesn't last. Busy mom's need to chose a style that works best with their busy lifestyle. Depending on whether she works outside the home or not, and what type of job she has, plays a big part in determining what style would work best for her. For instance, I would not recommend a style that requires a lot of blow-drying or curling iron work for a mother with an infant who simply does not have time for that. Just as I would not suggest a wash and go, casual hair style for most professional women.
Most women simply let their hair go when their priorities change, such as starting a family.
Not to say this is a bad thing, changing priorities is a part of life. However, I am a big believer in how you look directly impacts on how you feel.