What is the expiation for killing and aborting a fetus in the seventh month after the mother decided to abort it without her husband's knowledge, and she is now remorseful?

Aborting the fetus in the seventh month is impermissible. Marrying a woman without her guardian's permission is invalid according to the majority of scholars, and the child is not to blame for anything to be aborted. Aborting the fetus after the soul has been breathed into it is a destruction of progeny, and it necessitates one-tenth of the mother's blood money. There is a difference of opinion regarding the obligation of expiation for killing. Repentance for this sin and increasing good deeds are obligatory, for Allah Almighty said: "Except for those who repent, believe, and do righteous deeds - for them Allah will change their evil deeds into good ones. And ever is Allah Forgiving and Merciful."