I found these links that might be useful to partners.
The first one looks good, the other two are part of a 'webring' and I didn't have the time to trawl through and look closely, but I bet there's some good stuff there somewhere.
If you know of other sites that help partners post them here.
Parental Concerns Re: Child Sexual Abuse
This forum is from parents, grandparents, and other caregivers to have a place to discuss the many issues and concerns they have with regard to their child's(ren's) abuse. It is a place where they can go to communicate with others who have also dealt with this issue. Hopefully thru each other's experiences, support, and prayer we can be of help to someone else. http://www.network54.com/Forum/59049
The Support Group for Friends, Relatives, and Partners of Sexual Trauma Survivors http://www.geocities.com/Wellesley/5592/
Loved Ones of Survivors of Abuse Webring http://www.geocities.com/Wellesley/5592/rainbow.html