“His late wife was institutionalized for 13 years with dementia.”
She was 73 when she died.
60 years old is very very young to have dementia.
He has been with this other woman since the early 80’s.
Somehow they got her institutionalized at 60, 13 years ago.
They probably thought she wouldn’t take 13 years to die.
Dementia can strike younger people also, even in their 40’s. It’s more typical in older people, but it indeed can start much earlier in the unlucky ones.