Then hear what she has to say but you shouldn't be obligated to make any decisions or to reply to what she says. When she's finished, tell her you will take what she's said with careful consideration but you had rather not reply at the moment.
She will probably think you are trying to buy more time. So, if you do know your decision regarding whatever she talks about, then give her a calm response right then instead of waiting till later. The point is....don't fear her reaction to what you say (or don't say). Don't allow her emotions to dictate what your answer/response will be. After all, if everyone agreed on everything.....there wouldn't be a need for this board.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!