Yes I would advise to take her back nala. It REALLY is the only way to hit these puppy producers where it hurts – in the pocket!
I’m sure that she’s very sweet, but unless the owner is extremely wealthy (most insurance won’t cover things that were there before the policy was taken out) then this pup is a liability and the only person to gain will be the veterinary profession. Very sad but the truth often isn’t very palatable, I’m afraid. :'(