If she comes to your house she is not a baby sitter she is a nanny. If you take the kids to her she is a child care provider. I think you are paying a lot.
Also in child care you are paying for a person who is trained, fully licensed, who has first aid and CPR. has had hours and hours of professional training, etc....I think a "babysitter" should make a lot less per hour that a paid professional who is making just above minimum wages.
I think you are way over paying her for the care you are already getting.
Here's a copy of the State of Oklahoma's pay scale for child care. If a person needs child care and they can't afford it they can apply for assistance and this is how much they will pay a provider for services. The provider must have AT LEAST a "STAR+" rating or they lose their contract to get paid by the state. The more STAR's a facility has the more pay the state will give them.
All child care centers base their pay rates on what the state will pay. They can't really make one set of parents pay one rate then allow another parent to only pay part or the basic fee. That's just not fair to anyone.
Parents get up, get the kids ready to face the day. If the parent has to be at work at 8am and they have a half hour commute they have to have kids dropped of at child care by 7:15am in case traffic heavier than normal. They get to work and work 8-noon then go to lunch. Back at 1 and work to 5pm. They get to child care right at 5:30pm. That child has been in that facility over 10 hours and that is the normal day's length for all kids with parents who work 8am-5pm.
http://www.okdhs.org/NR/rdonlyres/2E81F###-###-####-487B-...
So, in a 3 STAR child care facility for a 3 1/3 year old child, between the ages of 25 months and 48 months the state of Oklahoma would pay a provider the amount of $27.75.
Did you get that? The whole day, up to about 10 hours for only $27.75.
If it's a 3 STAR home that is fully licensed and run by a professionally trained owner they get paid by the state the amount of $23.75, Per Day.
The provider supplies all the food, milk, all the snacks, etc...as part of that charge too. The parents pay nothing else nor do they provide anything else.
Now for an infant.
In a 3 STAR child care center the state would pay the provider $35.00 per day. For an infant up to age 12 months. Then once they were a toddler they would drop to$32.75 per day.
So top dollar child care for your 2 children would be a total of
$27.75 (3 1/2 yr. old) + $35.00 (infant) for a 10+ hour day = $62.75 per day. But most center's have a family rate that discounts the second child for cash paying parents.
$62.75 per day times 5 days per week = $313.75 per week for child care, that's over 50 hours of child care though.
So, a trained professional who is quite able to watch 4 babies, or 2 babies and 4 toddlers, or a baby and 5 older children (Child/Teacher ratio in Oklahoma) gets paid less than you are paying a nice babysitter.