i don't know about a website, there may be a local support group, i would ask whoever you are closer to (SIL or her DH) to ask their lawyer if maybe their is a support group for teens of parents who are divorcing and she can attend that.
honestly, i would be worried about websites devoted to that unless you, or someone else, could monitor her usage, which she would probably not be comfortable with b/c part of venting about your parents divorce at that age is the privacy you feel with your friends and knowing adults aren't going to "critisize" (sorry can't spell) your feelings. but with a website you'd have to worry about adults lurking going after kids who are not in the best state emotionally at that time.
at 1:08 AM on May. 13, 2009