I have a cousin like this. Her mom and my mom were actually cousins, so we aren't all that closely related, and as there is a few years age difference, and the fact we didn't get togethr too much as kids, we've only had a real relationshp for the past 6-7 years. She tells me I am more of a sister to her than her own, who is a nightmare, but, its always about her. She also lives near her DB and SIL, and they say the same thing. If its to HER benefit, she's all about it, and in fact, they've learned she simply just doens't call to get together, its usually beacuse she wants something.