How are the boys handling the changes?

Pretty well, considering.  Patrick is just thrilled.  He asks to go see the girls, and when we're there, asks to hold them and/or pet them.  It's clear he's really enthusiastic about this big brother thing.  More so than the last time around.

Charlie, on the other hand, is having a tougher time.  It's not manifesting in outward hostility -- he also asks to pet the girls, and he'll proudly announce their names to strangers -- but rather in occasionally going on strike.  He'll refuse to get out of the car; he'll refuse to come to the table for dinner; he'll refuse pretty much anything that he used to agree to a matter of course.  Which is worrying.  He's generally such an agreeable guy, it's the contrast with his usual self that's the problem, not the difficulty in an absolute sense.  Patrick on his best day is more contrary than Charlie on his worst.  But not right now.

Charlie's coping mechanisms are quite unique.  He's processing a lot of past events today, and asking me whether I was wearing a belt or a long-sleeved shirt on those days.  I just tell him "yes" to each even when I can't really remember.  A white lie, I know, but I think he needs the assurance that the world hasn't really changed all that much, or not in the important ways.