BL42 touched on many good points, but I wanted to focus on this one:
Originally Posted by Wolfman
she doesn't have to work and that does not sit with me well.
At a minimum, she's nannying a young child and possibly doing housekeeping, cooking, laundry, etc.
Originally Posted by Wolfman
I didn't think about how much money she is saving us with taking care of the baby.
"does not sit well with me"--The thought that she's not working or helping the bottom line seems to cause you resentment. Try this--list what she does and how much it would cost to oursource. Get specific. E.g., if she does housekeeping, a monthly service may only charge $500, but a weekly service may charge $1200. If you'd rather do a task yourself, that's fine--substitute your typical hourly work rate for the cost of doing the task. How much is she helping the bottom line?