* She was not a biological sister of Prophet Aaron, the brother of Moses. The name of Aaron signified purity and righteousness among the Jews of that time. So the title ‘Sister of Aaron’ meant to indicate that Mary was like Aaron in righteousness, as she was his sibling in purity and virtue. It may also refer to being a pious daughter from the noble lineage of Prophet Aaron.
* This refers to the bridge extended over Hell, known as ‘al-Sirat.’ Both the believers and the disbelievers will have to cross this bridge. The believers will cross it safely at a speed corresponding to the strength of their faith, whereas the disbelievers and the hypocrites will be unable to cross it and will consequently fall into Hell.