Great set up! And I don't dare post what I'm thinking of as a fill in. Perhaps some fan will dramatize it one day in DS slash fiction. Well, if they haven't already...
"...I wasn't happy about his cheating in life, and I won't stand for him cheating on me in death, so his new bimbo had better watch out because I'm not afraid of her or Gerard - got that...oh, and by the way, guns work on portraits too!!"
...stomp on a small colony of ants who would be precisely on that spot on Thursday... (Though what good it would do it then when they wouldn't actually show up for days was anyone's guess. It was just the whole compulsion thing, I suppose...)