A new mishnah: a widow is provided for from the orphans' inheritance of the estate. Plus, a Gemara that queries the particulars of the widow's status, based on the mishnah's wording. Also, the kindnesses a widow does for her husband's heirs. Likewise, the services a student provides for his teacher, not including those practices done by a slave. Also, how a widow is paid - with movable property, etc. What if she doesn't claim her rights? When does she forfeit mezonot? But upon whom is the burden of proof regarding what she's been paid and what she's entitled to?