Just because she can live alone and get to the hairdresser and Wal-mart doesn't mean that she can ADD the stress, workout, exhaustion of a bridal shower or wedding on top of that.
My grandmother-in-law is 90. She still lives alone, but we hold all family events at her house (or drive her to one of her kids' houses which is on the same road). She is driven to the hairdresser and doctor's appointments. BUT now that she is older, she doesn't go to church even if someone drives her (she attended EVERY Sunday until about 2 years ago), so you know what? People from church visit her. Maybe she really just can't do it anymore, OP
My grandmother-in-law is 90. She still lives alone, but we hold all family events at her house (or drive her to one of her kids' houses which is on the same road). She is driven to the hairdresser and doctor's appointments. BUT now that she is older, she doesn't go to church even if someone drives her (she attended EVERY Sunday until about 2 years ago), so you know what? People from church visit her. Maybe she really just can't do it anymore, OP