Greece... Ireland... Now Portugal. Amid worries of rising debt financing costs, France and Germany are reportedly pushing Portugal to take a bailout before their yields (and much of PIIGS') get worse. No formal talks have started yet.
At this point Germany and France just have so much invested and they will likely try hard for this thing to not fall apart. I do however believe there will be a tipping point if things continue to go south at which they will just cut their losses.