@kwendy welp I admit my mistake in my choice of words which exudes exaggeration or hyperbole, I apologize for making misunderstandings, but my point still stands
Kaph can't refuse her, that's exactly why she left Fran with him, Leander knows he can't, and it's against his will, but it works just as she wanted, just like how he took care of those filthy pigs, he took care of filthy toddler Fran, and not able to abandon Fran or neglect him, he raised Fran with love. He genuinely love him, just like he genuinely love those filthy pigs Leander kicks, and just like when Leander brings those filthy pigs she kicked sweet potatoes, she gave Kaph money to buy a patch of sweet potato field with extra tips because it is due time for her to cancel the curse of the pigs but in this case the curse of the Fran.
And how do Leander know Kaph wont be able to abandon Fran and not doing it out of obligation or a job given from a noble? Leander knows his kindness and integrity, the reference is from part 1 of leander doesn't cry. She said, He's the only warm spot of sun in the cold northen field, that speaks a lot in itself.