What about if someone asks you a direct question that you know they will disagree with the answer to?

For example, the MIL asked me the other day if I will be using cloth or disposable diapers. I plan to try cloth and I know she disagrees with it, which she expressed when I answered. I just feel like she keeps setting me up to be put down by her. Maybe I'm just being super sensitive, but I feel like she should shut the he*l up.