Grease the wheels, with butter and brown sugar.

↓ Transcript
TODD: Okay, we're here. So, I forget am I NOT asking her, or...

AMANDA (vo): ASK ASK ASK!!!

SFX: knock knock

UNKNOWN VOICE: ACK!

ANDI (VO): Oh crap, that must be Todd.

UNKNOWN VOICE: Already?! AAAH!

AMANDA: What's going on...?

SELKIE: Who's that?

TODD: ...Hey, girls, do me a favor?

TODD: Can you both go to the lobby and get some snacks from the vending machine?

AMANDA: Huh? Why?

TODD: ... To bribe your mother. For the water park.

AMANDA: YES! Finally, Dad's talking my language!

No, the mystery "ACK" voice is not Cathy.