- solution 1
On this day,the wife shot him, held him under water and then hung him up.
Possible explanation
"He" wasn't her husband but another person.
So the husband and his wife are
both professional killers
They both love
killing
so
maybe he promised to marry her only if she would prove that she was a real killer and kill a person after the marriage.
and
Then they went out on a honeymoon. Wonderful relationship.
makes sense now.
"Oh my dear, lets go now and be together forever. I trust you with my life since you proved to be a real professional killer."
PS: Maybe I added a lateral-thinking tag to the question in my mind...
- solution 2
They were married this day.
Maybe...
...the wife (let's call her Alice1) married a woman (Alice2)
so
On this day,the wife shot him,held him under water and then hung him up.
"him" referring to
Alice(1 or 2)'s ex-boyfriend (Bob1 or Bob2, depending on whose boyfriend it was)
So we have 4 possibilities:
-
Alice1 killed Bob1 because he cheated on her.
-
Alice2 killed Bob2 because he cheated on her.
-
Alice1 killed Bob2 because she didn't want Alice2 to fall in love with Bob2 again.
-
Alice2 killed Bob1 because she didn't want Alice1 to fall in love with Bob1 again.