Clothes worn in the state of janaabat

When a females monthly periods of 7 days are completed every month and after 7 days if she takes a normal bath from head to toe but does not perform ghusl /ritual bath to become paak and wears pure clothes, will those clothes become naapaak? And when she wants to pray later when she purifies herself in these same clothes (which are not purified) can she pray namaaz? I also want to know about: Are the clothes worn after taking a normal bath (i.e. not performing ghusl) after the sexual intercourse if not soiled remain paak for prayers or not?.