In the 1993 film Shattering the Silence aka Not In My Family, Shelley starred with Joanna Kerns (as her sister) and Dina Merrill (as their mother.) Talk about perfect casting, the three women look like they are related. It brings to mind the comment Nolan Miller once made in an interview where he likened Shelley to Dina. The film is available on DVD but a short clip from it is on YouTube. Check it out...
Shattering the Silence clip on YouTube
http://www.youtube.com/watch?v=WurWq9Gw6ys