That isn't how it works in Nova Scotia.
The NS day care regulations state "no more than 6 children including the carer's own if younger than 12 years".
Now it's slightly different depending on if registered or not.
The easiest way to explain is for an unregistered carer, it boils down to no more than 6 children per address. It doesn't matter if there is another adult in the house. The limit is 6 - period. In the instance where your step children are there over the summer, if you were in NS, and if those step children are younger than 12, then they would be included in the day care numbers.
However, if you are a registered provider, providing that your step children were being cared for by another adult in another part of the house and had no interaction with the day care, then you would likely get away with it since they aren't permanent residents in the house and could be considered visitors.

