Is she relocating back to San Diego from D.C., or is she just trying to meet up with you when she is in town? I would think that since she is going through a divorce, she is trying to reconnect with friends she feels she may have "left behind," or "lost contact with" over the years. If you don't want to hang out with her, just say you're busy. Unless she is dense, she'll get the hint. Just because you were friends with her once upon a time, doesn't mean things haven't changed, and There is no excuse for her obligating you with her problems or animals.