Because he's in thrall to a psycho? The pull-her-plug boogie didn't begin in earnest until you met him.
Is that not one of the all-time stupidest questions? He hates her, he wants her out of the way, he wants her money (all true) -- those are motives for murder. Not love.
If George can't get that straight, he belongs in the Camp for the Incurably Froot-Loopy.