Mary wasn’t very good at anything he decided.
The house was a tip. Dust everywhere, even under things like drawers! The hoover never seemed to be used and papers piled up on every surface. Nigel, of course, pointed out her failings to her every day, mentioning his numerous allergies in glorious monotony. Mary smiled and carried on doing what she always did.
After 45 years of this, Nigel decided he’d had enough and told her he was divorcing her. Enough was enough.
She nodded agreement, then handed him a cake containing nuts.
And smiled as he choked to death.
Marj's writing 
Deliciously dark ending! (literally) 😉
Why thank you! The last few words were the prompt…