How to run a household without a designated 'mom'
Notice the invisible tasks: buying supplies, checking bills, scheduling repairs, reminding people, welcoming new roommates, and deciding what is for dinner. Put them in the same rotation as sweeping and taking out trash.
Use a shared calendar, list, and expense record so the household does not depend on one person’s memory. Adults should own their own deadlines and learn the basic systems.
A home works better when care is shared rather than quietly expected from one resident.