What is the ruling of Islamic law on a woman who performs abortions for pregnancies resulting from adultery and restores the hymen for girls who have lost their virginity, under the pretext of concealment and that "whoever conceals a Muslim, Allah will conceal him on the Day of Judgment"?

What a woman does by helping girls abort or repair the hymen is not permissible; because it is an aid to sin. Abortion is forbidden except in cases of necessity. Repairing the hymen is not permissible because it involves exposing the severe nakedness (awrah mughallazah) without need, and it involves deception and fraud towards the husband.