IMO best way to avoid conflict is clear concise communication about expectations of each other!

My financial contract is two pages long outlines all the various 'payment' scenarios and I also have my 'parent handbook' that outlines what I offer in the program and what I expect from them within the program is 20 pages long - covers everything from my nutrition philosophy, sleep time philosophy, toilet training philosophy, behaviour and guidance and code of conduct for behavior as definitely an illness policy from when it that starts at home or what happens if they take ill within in the program and how it must be handled and so forth - every 'issue/stage' in childhood that a family might typically go through in my care is basically outlined as to how it will be handled in the program so no 'surprises' for them and the key is not only to HAVE the policy but to follow them and if you choose to BEND a policy make it clear it was a one time thing and should not be 'expected' again in the future so plan better next time - otherwise clients WILL push the envelope thinking 'she bent last time so she does not really MEAN what she wrote there'

I would definitely develop a clear 'illness policy' so that clients know what to expect upon enrollment around what their child can and cannot attend care with and what the 'consequences' of not following the policy are ...24 hours exclusion SYMPTOM FREE after diarrhea or vomiting is STANDARD in most health units - plus if there is a documented 'outbreak' of something in the community like Rotavirus or Norwalk it goes up to 48-72 hours and again that is free of symptoms ... so from the last time they vomited or had diarrhea! If you do not want a parent holding you to the 'exact hour' I would word it that the child needs to be home a 24 hours plus the remainder of any partial day if the 24 hours falls mid day ... so if you sent them home on Monday with symptoms and they still puked once on Tuesday at 11am they need to be home ALL DAY Wednesday symptom free as well!

As for the concern about 'breast feeding' and having offered the one day and now it being 'a normal routine'- tough call for sure. If you are truly not comfortable with it or do not have the 'time' to always offer this just explain to the client in the MORNING so she can prepare differently 'I really empathize the babe is hungry unfortunately I have somewhere to be tonight and cannot offer the option of staying to feed tonight' ... does she drive cause she could always feed him in the car if absolutely necessary before driving home - lots of mamas have to pull over to feed once in a while?

Or if you do not have anywhere to 'be' persay and are just growing resentful of having to keep her company I would just say your more than welcome to feed but tonight I have some stuff to get done so cannot sit to keep you company." and go about your business?