Oh my! Till now I thought they've had been few days for beauty in the palace and some weeks for her sisters in the farm... Now I see the baby's face and its gestures and it's obviously not a newborn and I think time has really passed by for real months and I can't really remember how Beauty saw her sisters in the fountain but I find them amusing and brave for keeping hope of seeing her after so much time of unknowing. I would have already desperaired and mourned and all!
SUBTLE, GUYS! Also, yeah, Beauty would be dressed in something nice--the castle is filled with finery. Their respective takes on questioning Beauty about her time away--that they're not sure they want to know the (potentially gory/"I'm not sure I want to know if our sister is a furry") details or risk upsetting their sister--make sense, though they'll probably need to ask at some point anyway. You can't get past the elephant in the room if you don't acknowledge that it's there, after all.