Need to hire a "mom's assistant"

I would like to hire a ?????mother?????s assistant????? for the afternoon weekdays, and some Saturday mornings (2 hours). I have two children, ages 7 and 9. I need help from 4:00-7pm weekdays (picking up kids from afterschool care, getting them to soccer practice, gymnastics etc)????.

There is also an opportunity for overnight babysitting occasionally (both my husband and I travel), and some additional weekday hours (for help with general errands?????run to dry cleaners, etc).

If anyone has recommendations or knows of someone who might be interested in this kind of a position, please send them my contact information: sherril at Stanford dot edu.

My office phone is (650) 723-6113.

Thank you!