Speak with her / Go to the ATM near shop / Go to dad / Talk twice / Give him alcohol / Go to the ATM – code 6969 / Go back to maid / Use money on her
... On the Keyboard write "Aunt", click 6969 "OK", I got Wrong PIN
...I'm stuck at atm, can't enter the pin. It says 'aunt' on the screen. ...
... Go to dad / Talk twice / Give him alcohol - did you do
exactly this? Talk to dad, then leave, do something else / talk to some NPC, return and talk with dad again, get your old guy some
booze.
If you're stuck you mostly need do something else
before - speak to NPCs or interact with any items (get booze?). Maybe it's a
hint for you, so go talk with "Aunt" in this case?? I don't remember, just a guess.
Edit:
Thanks to
@Henryhyde for this advice. Think it could be left there as a
hint to do something else before. But yes, shouldn't stop the maid quest from getting finished. So the word 'Aunt' can maybe deleted, to go on and interact with the maid.