cinderella- sounds like what ur doing is the best way for this particular situation then. When u do take her calls, dont gush about having not spoken to her in so long, and dont do so long or in depth convos?
On the other hand, i dont know why you are trying to cut her off, but make sure its a valid neccesary reason? Esp right after yom kippur. Try to view things from her shoes if its of that sort.