This is a special kind of Purgatory: Juggling the 3.5yo who stubbornly clings to PullUps and refuses to poop in the potty with the 19mo who refuses to let me put her in a diaper until she "peepee pahyees" even though she has no bladder control. He won't sit there long enough to go and she won't move until she does (which so far has been never).
[Not one minute after first posting this, Miss M came running to me screaming, "peepee pahyee!" Sure enough, she pee peed... on the floor. *sigh* Again, I ask you WHY!?]