Can a nursing home tell you that you are going to see your parent too much?

I had to put my mother in Extended Assisted Living after my Dad died four months ago. I took her to live with me and she broke her pelivic bone. It has been very traumatic for me and her. Its been a rough time, losing my Dad and selling her house. I go see my mom for an hour in the morning and go back in the afternoon and spend time with her and take her to entertainment if they have it. I get comments like, "Are you back again", "Do you come every day". I would think they would encourage family to come. I don't want my Mom to think I have just dropped her off there, I really want to take care of her but can't. Am I visiting her too much??