What is the ruling on accepting financial aid from a Christian woman, and earning from her restaurant that sells alcohol, or from insurance money after her husband's death, and must it be returned?

It is permissible to accept gifts and assistance from non-Muslims, as the Prophet, peace and blessings be upon him, accepted gifts from polytheists and Jews. It is permissible to accept money if it is not definitively known that its source is unlawful, such as usury or the money of orphans, and if the acceptance is not for the purpose of committing a forbidden act or inclining towards her religion. Gifts should be accepted if they are motivated by humanity, intended to win her heart, and to invite her to Islam, while emphasizing that it is impermissible to establish an unlawful relationship with her or to be alone with her.