I read this online:
If your parents were divorced, you’re at least 40 percent more likely to get divorced than if they weren’t. If your parents married others after divorcing, you're 91 percent more likely to get divorced.
So FI & I are screwed since both sets of our parents divorced and then remarried. Damn.
http://www.thedailybeast.com/blogs-and-stories/2010-05-19/15-ways-to-predict-divorce/