All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah and that Muhammad, sallallaahu ʻalayhi wa sallam, is His slave and Messenger.
It is not permissible for a wali (legal guardian) to force an adult thayyib (previously-married woman) under his guardianship into a marriage, as we previously highlighted in fatwa 90190. We have also underlined in that fatwa that if such a marriage took place without her consent, then she has the right to accept it or annul it. However, if your friend gave her consent to the marriage contract, as you have mentioned, or showed any sign that can be interpreted as an approval of such a marriage, as is the case if she allowed the husband to have intercourse with her, then she is not entitled to annul the marriage in this case.
The Hanbali scholar Al-Hajjaawi wrote, “It is prohibited for the wali to marry her off against her will to an incompetent suitor, and such an act on part of the wali entails declaring him a faasiq (dissolute person). However, her right to choose whether to approve the marriage or annul it is waived by any sign from her, whether it is a word or action, that indicates her consent.”
In case she showed a sign that can be interpreted as approval of that marriage, if she hates her husband, then she is entitled to request a khul’ (i.e. divorce at the instance of the wife in return of consideration payable by her). Please refer to fatwa 89039 about khul’ and the relevant rulings.
If she can possibly accept the man whom her wali approved for her as a husband, then she should do so; hopefully, this may be a reason for earning the blessing of Allaah for this marriage, especially if she accepts whom her father has accepted for her as a husband out of dutifulness towards her father.
Allaah knows best.