Do you get a sense that she ever gets suspicious of John and his sister's care?

1) When the narrator attempts to convince him to repaper the nursery, John rejects her request almost immediately. He demonstrates his continued belief in his superiority over the narrator, particularly in terms of her health. By removing the wallpaper, John believes that he will be indulging his patient, submitting to a foolish request. Yet, as the narrator notes, the wallpaper is already extremely damaged, with large spots missing. With that in mind, it seems as if John is refusing the narrator’s request simply for the sake of refusing it.

2) The narrator’s desire to visit her Cousin Henry and Julia is undermined by John’s control over her. Although she attempts to outline a clear argument for the visit, John’s inability to comprehend her feelings results in a complete emotional breakdown. Because John does not allow the narrator to assume the role of a mature individual in charge of her own life, she is doomed to failure every time she attempts to make a point against him.