Fill in Babynurse needed for International Family

Baby nurse needed starting July 28th for an International family that will be in San Francisco for the birth of their second child. The family has a full charge 24/7 baby nurse they are bringing from London. We are looking for someone who is flexible and able to work on a team. The job starts in San Francisco for 8 days and then you will be in Los Angeles for 7-8 weeks. The family needs someone to cover the main baby nurse for her four hours that she takes a break.
On some days yes it would only be 3-4 hours and other days we would be looking at 1 day of 24 hours with the newborn per 7 day period and then possibly another 12/24 hour period in a 7 day period with the 1 year old.  So it would be 1 x 24 hour, 1 x 12 or 24 hour(this is likely to be the more flexible and unknown at the moment as this is for the 1 year old older child), 5 x 3-4 hours per day in a one week period.