A question about my grandpas will?

Yes. He should make one while he is mentally able and coherent. Pain and medicines can dull your mind. If your grandma was married longer to your granddad than his new wife she may be able to get his SS and any pensions. I think the law states a new spouse has to be married 10 years in order for them to collect SS. Talk to your granddad and see how he feels about making a will. Poppy