What about leave entitlements? If she were actually breastfeeding that is pretty much a seven day job, and as an employer you have to provide leave. Would you include random drug and alcohol testing in the contract? If you want her to follow a specific diet (and you are not providing the food ie cooking for her), does she get extra monetary payment to cover her for any extra expense plus a bit extra for her inconvinience. And during the day, does the baby go to her place, or does she come (with her small children), to yours?