Mahrams

Q: Are your grandmothers sisters mahram  and are your grandmothers sisters children mahram and is your moms brothers wife Mahram?

Marrying the daughter of a woman who breastfed one

Q: A child drank milk from a woman. Later vomited it all out. Would it be haram for this boy to marry this womans daughter. The families are very close to each other. (I said no, but they said, the boy vomit it out. i said, there is a possibility that some stayed in the stomach.) They want a response from a mufti saheb. To complicate it shiek Usaymeen of saudi arabia in his fatwa kitab said so long as it is not beyond 5 sucklings it is ok, this maybe the hanabila view. The person asking is hanafee)