I think it's wonderful that you fostered for a pet whose owner is overseas. I recently learned that there is an organization that looks for foster homes for military folks (not just going overseas, but also going into training and what have you). They probably have paperwork that specifies that the owner is monetarily responsible for vet and food bills. I hope a lot of military people are using them, apperently many dump pets when they are called away... the military is trying to help (actually, not sure who started this up but..)
Glad you are out of this ick glich in your life- you did a great thing and he loved you and will great you over the rainbow bridge with kittie bumps and lovins! I think what you did was truely above and beyond the call of duty! Please don't hesitate to foster again just because of this one person...