I'm feeling quite sorry for this woman, it appears that they have little friends if there is nobody else see him on his birthday
I would imagine I'd do something similar if dd1 expressed an interest or mentioned others as I'm terribly shy and it'd be a nice way to meet people. Unfortunately it appears dd1 takes after me 😪
At least these days there is always your phone to play with if things get awkward.
Go, drink tea, and bring a small pressie to be polite