I adore my one actual sister in law. I'm the only girl in my family, so it was nice to finally have a "sister." I've often told her that if she and my brother ever get divorced, I'm going with her. We hung out together a lot before the kids came along, now not quite as much. My other "sister in law" (technically just my brother's on again/off again girlfriend, mother of my nephew) I cannot stand. We used to be friends, until she turned into a psychopath. We no longer speak to each other.