I have a question along a very similar vein.
Yesterday I was talking with my great-aunt. She told me that when my grandmother (her sister) was going to be baptized, she asked her if my grandpa had been baptized. If he hadn't then she'd better not get baptized herself because she wouldn't be spending eternity with him! Then as I began to explain God's truth to her she said that she thought she was good enough to get into heaven probably because she'd never really done anything much wrong and if she wasn't good enough that was ok because all of her friends would be in hell anyway. There was more to it than that - she made some more inane statements and I calmly tried to just explain things to her - about believing and not works, repenting of sins. I just sort of figured she'd know all this at her age. She's in her 70's. Has she never heard a sermon at someone's funeral?

My question is - do I follow up now? Or do I let her go on the info I've provided and just pray. If I kept after her - would that be casting my pearls before swine?