It's a strange feeling something serious is troubling the woman.
That was when Mary decided to relieve her mind of a troubling thought.
Of course he would feel responsible for working it out and not troubling her with it.
Her erotic dreams were proof that he was becoming more than a friend to her, and that thought was troubling - both from the standpoint of her goals, and the fact that she was setting herself up for rejection.
Something's been troubling Martha for the past two weeks.