Is abortion permissible to preserve the wife's relationship with her husband's children?

Aborting a fetus is forbidden at any stage of its development. The prohibition becomes more severe after the soul is breathed into it, because it is considered murder by consensus. An exception to this is made only in cases of necessity, if the continued presence of the fetus poses a definite danger to the mother's life. What the questioner mentioned is not a valid reason for abortion according to Islamic law. She should turn to Allah and supplicate to Him to improve the circumstances of her husband's children, and she should continuously treat them with kindness.