Not sure what the shelters are like in your area, but the shelter I work at will sometimes waive the surrender fee for litters provided the owner get mom spayed within 30 days. That way we can make sure the pups are adopted into the right homes and the mandatory spay/neuter of the adopted dogs is completed.
If they dont' get mom spayed in the required time frame, then they get hit with the surrender fee and a fine for not having a breeding permit (which is required in town). We also provide them with information on the low cost s/n clinic we use and strongly recommend it since they pick up and drop off at the shelter so we can confirm the surgery is done. In most cases, we only know about the litter because a kind person reports the situation to the shelter in the first place. Maybe her local shelter would be willing to work with her in that way?
Avery - Southpawz Elf Queen, CGC- Siberian Psycho Terrier
Brogan - Southpawz Mystery Man, CGC - Ephelis Spaniel
Fenway - Southpawz 4 Yawkey Way -Bull Collie
And the crazy cats