I think that once you start being so available it's all over. My Dsis IL is a wizard at what she does, but the most uunderappreciated person I know. Years ago, she was the executive secretary ( I said it was a long time ago) to the president of the most prominent company in or area. Her phone rang at all hours of the day and night, if the boss thought of something he called her, and she had better answer. She did, and she did more and more, and then more. When she finally had enough they could not replace her from within, no one could or would do that job. She has done the same thing in every job she takes, and IMO she is not appreciated, but the employer takes advantage of her willingness to excel.
It is disgraceful, but the attributes that make her so valuable are also the attributes that are a detriment because there are no real boundaries in place. She thinks I am brave because I was able to say no, but I think I just knew how to survive. I would love just ten minutes with her current employer. If they have no idea how valuable she is and the asset they have in her, I would love to make them aware.