Reference: Fataawa Muhimmah li-Nisaa. al-Ummah – Page 61
Question: Is it permissible to eat from the hand of a menstruating woman? [Please] advise us [and may Allaah] reward you.
Response: There is no harm in eating from the hand of a menstruating woman, whether she has cooked [the food] or she (hand) feeds you or that which is similar – so all of this is permissible, as the Prophet (sal-Allaahu ‘alayhi wa sallam) said to the menstruating woman:
«[The issue concerning] your menses is not in your hands (i.e. not your choice/beyond your control)», [transmitted by Muslim – Volume 1, Number 2451, and-Nasaa.ee – Volume 1, Number 146]
So that which she does with her hands or passes to you by her hand, there is no harm in that because [the issue of] her menses is not in her hands, and Allaah [alone] has the Complete knowledge [of all affairs].