What would you call a person who doesn't like questions being asked of them?

Question

My sister says I ask too many questions, such as "What have you been up to lately?" She is the only person who says that.

What do you call a person who doesn't like questions being asked?

Answer 1

Another good word would be reticent: inclined to be silent or uncommunicative in speech.

Answer 2

There may be different reasons why questions about oneself are unwanted.

shy people feel uncomfortable being in center of others attention and that includes being asked a lot of questions.

secretive people either have something to hide, or just don't like ttalking about themselves much.

Same goes for silent in the meaning Not inclined to speak; not talkative.

Answer 3

If you don't want to be critical of her, you could say she's a private person.

If you want to imply she might be hiding something, you could say she is secretive.

Answer 4

In answer to your question "What do you call a person who doesn't like questions being asked?", I think of such a person as an authoritarian, self-important, fascist, close-minded, stupid, supercilious, cross-grained, arrogant and imperious fool, dunderhead, or dictator.

But perhaps that's not what you want to know, and perhaps meant to ask, "How should [Maureen] refer to this question-averse aspect of her sister?", which of course I don't know. However, if previously-suggested shy, silent, private and secretive don't apply, also consider veiled, introverted, taciturn, censorial, no-nonsense, thin-skinned, touchy and untalkative.