If I were MB, I think knowing my kids had another consistent grownup figure in their lives to support them, change the mood around the house, would help me a lot.

Also knowing that I can cut back on your hours without stress to you would be helpful to me. All of my nannies were very sensitive to the number of hours I would give them and if I cut any, they would have to quit.

Just having this situation would help me a lot.