Babysitter Needed

We are looking for a nanny/mother's helper for a work-from-home mom from approximately 1 p.m. to 6 p.m. daily (schedule is flexible). We have two kids, a 1-year-old who has special needs, and a toddler who is in preschool. Most days mom will primarily take care of the younger kid except when she has meetings, and would expect help with light work around the house until 5 PM, and picking up the toddler from preschool in the evening (5 mins from the house) and watching him until 6. On days where the toddler is off school, help will be needed watching him for the full shift.