Re: ARRIVALS
So Buffy obviously walked in a few moments later, with Sam (presumably!), and they'd been out getting lunch, and so she was dressed-up a little in a slip dress paired with a jean jacket, and with her Louboutin boots that she got from Santa, THANK YOU SANTA.
She was really not expecting a Surprise Party and so she was properly surprised and delighted and would say hello to everyone who came, and honestly she's just really pleased to have a party!