Is it permissible to continue paying a monthly sum to the deceased's sisters from his company, despite their having become heirs to their deceased mother's share in the company, and does the ruling "no bequest to an heir" apply to them?

A man's bequest to his sisters of less than one-third of his estate is valid, because they are not his heirs due to the presence of a male son. The bequest does not require the wife's approval; rather, it must be executed.

It is not permissible to delay the division of inheritance or to prevent an heir from their right. The wife's prevention of the deceased's mother from her share is a reprehensible act for which she must repent. It is not permissible to force her to donate her share to her grandchildren unless it is with her full consent.

If the mother dies before donating her share, her share passes to her heirs, including her daughters. This does not affect the husband's bequest to his sisters. It is permissible for the sisters to keep their share in the company if all parties agree.