Yosef Karo, Translation:Shulchan Aruch/Even ha-Ezer…
“ This all applies to a married woman. A betrothed woman, however, who rebels against her husband and refuses to move into his home may be divorced against her will. Alternatively, he may marry another woman, and is given permission to do so (ibid.) . It seems to me that this all applies within 12 months. After 12 months, if he wishes to divorce her, she must accept the get even against her will, or else he is permitted to marry another woman, for a woman does not have the power to chain him forever. ”
