having not known the "Things I long to forget" I know it makes this easy to say; so please don't get mad at me but,
for the good of yourself, sounds like you need to forgive an entire situation, he is obviously sick to be "Taking these pictures of your grand daughter.."
but my guess is whats made him sick was probably not entirely his fault,
Of course I may be wrong, he may be the devil himself,
but this is about you and moving past.