My sister only calls when she's going through things?

Its draining and she very dramatic over small things. I been there for her and been a listening ear. I even gave her advice but this has been going on for 3 months. When I call her she not even there to pick up most of the time. Sometimes I ignore her call. My husband gets frustrated with me because she calls me and than call his phone. It's too much. What should I do? It's draining me.

My sister only calls when she's going through things?
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