Do you mean the cat is following her around the house? This is usually a sign of affection if the cat has an accepting posture (tail up, meowing, rubbing gently). Some cats are friendlier than others and like to be around the people they like....whether or not those people like the cat!
It is a pretty big honor to have a cat follow you and want to be near you as they are very individual animals and do not bestow their affection on just anyone. If the cat is having a more aggressive posture or behavior (stalking, biting, hissing, swatting) this is a sign of not accepting the person. Most cats will avoid people they do not like though...they do not generally pursue them.
Hope this info helps. If you have any other questions, just hit reply and ask!