I don't know of any online support groups for family members but you (or your spouse) can always vent on here! I am the mom of IBD children and this forum has been a godsend to me. I can ask lots of questions, discuss my concerns and fears, and find the support I need. Nobody judges. Even though the family does not have this terrible disease, it doesn't mean that they aren't hurting too.
I do know that local CCFA units often have support meetings for families. I have never been because this forum has been what I need but you may want to look into it.
--Mom of bratcat (18 years old) and nonamejames (20 years old)--
Daughter bratcat was diagnosed with pancolitis October 2006
Flared Fall 2006, Fall 2007, Spring 2008
Asacol, Rowasa, hydrocortisone enemas, prednisone, 6-mp, Remicade
7/3/08-Step 1 j-pouch surgery and no more meds!
11/10/08-Step 2 reconnect! Living and loving life as a teenager should!
Son nonamejames was diagnosed with Crohns in Spring 2008
Asacol, Pentasa, 6-mp