me: today is bianca's birthday.
mom: how old is she?
me: um...let's see, i'm 27--
mom: --YOU'RE 27?! i thought you were--- someone just asked me how old you were and i told them 26 but then i was like 'maybe she's 25'.
mom: i can't believe you're 27. you're old!
me: ...and ricky's 30, so that means bianca is 29.
is this endearing or should i worry that my mother is losing it?