People did not question her presence for some reason.

She did not challenge him as her brother had done or question his presence in any way.

Many turned and looked at me, though no one questioned my presence.

So far no one had questioned my presence on the block.

No one seemed to have noticed him, or to question his presence.

She didn't question their presence here at all, had no concept of what might happen to her.

Though he had no official reason for being there, at least the staff never questioned his presence.

He looked past her to me, undoubtedly questioning my presence.

If someone saw him and questioned his presence there, he'd have little to say in defense.

Once out, he could run up with the rest of the crowd and no one would question his presence.