It was because of her

 She had no idea why they were fighting or why Cedric was determined to kill Alfonso all she could do was scream. This was not the place he could do something like that; her reputation was already a mess because of a miscarriage, and talk less about what would happen when she got known as the wife of the man who beheaded his brother.

 

 Cedric lunged forward, blinded by fury, his sword blade target to slay Alfonso's head just before the tip sliced his throat, and Cedric's hand froze. Time seemed to have stopped and Abrielle's breath was hitched.

 

 He heard her call his name but he didn't glance over. Alfonso was so terrified, his knees weak, and he fell on the ice-cold ground covered with snow. 

 

 "Cedric," another female voice called softly, it wasn't Abrielle but Callista who was trying to get back up. She tried to get up in the process and ended up coughing out a mouth full of blood.