The Divorce

The Divroce by Shikhar Dixit (a Short Story Contest entry) 

As Cole's fist prepared to strike for the very first time in fifteen years of marriage, Ellen intended to square off against him. She had earned her 1st degree black belt in Aikijujitsu, yet her bowels were turning to water.

She trained in a dojo. He was an active-duty marine scout/sniper in Afghanistan. Memories don't lie ... Aikijujitsu saved her mind. The deeds Cole performed in war's darkened theater ate at his sanity.