^^^ Severa, tha client, has SEVERE mommy issues( it's her mothers fault, in my opinion, although it's complicated). So she pays Anna, the merchant/trickster to "cosplay" as the younger version of her mom to have a "Freudian therapy" session.
I tooooootallyyyyyyy get it! Like, you don't want to get in between your OTP ship, but you want to have them in a fitting place of adoration, the answer is simple in deed.