I can't imagine how it would be possible to pass wind, but I could be wrong.
What sort of ostomy does she have? With a loop ostomy it is normal to have to go rectally often. With an end ostomy it is still possible if she has any colon or rectum left.
Hopefully someone more knowledgeable will pop in here and help you out more.
Diagnosed with UC in 2007
Flare in 2007 causing anemia requiring blood transfusions, eventually controlled by asacol and 6-MP.
Flared again in 2009 as 6-MP lost effectiveness, went on TPN and received more blood. Started Remicade, which induced remission.
Flared 2010; Remicade no longer effective.
Had 1st surgery of 3 step j-pouch at CC on 1/19/11. 2nd slated for April, and j-pouch in July!