Hey, PIB... I don't know how old Lily is, but anesthesia is VERY safe these days.
It seems that cats are very susceptible to abcesses, and seem to get infected easily, but they usually always heal. Your vet may have you soak the foot, if she will let you do it.
Declawing is generally tolerated very well, if the claw eventually has to be removed.
Hope all is well.
Relax. Appreciate. Be calm. Laugh. Enjoy. Be secure. Be loving. Be loved. Don't personalize. Don't ASSume. Accept. Be grateful.
