A man who uses the "c" word in an argument with a woman--much less in a discussion about a woman--has just gone nuclear, and should prepare for a sudden escalation in hostilities. I really cannot believe that anybody (outside, say, Andrew Dice Clay) could make the argument that this word is a "term of endearment."
Besides, in my view a "term of endearment" only qualifies as such if the person to whom the remark is directed perceives it to be endearing.
Escalating hostilities with his wife was exactly his intent. (You'd have to know this guy to understand how much he LOVES to fight. He's also Extremely liberal and loves to fight over politics. He's one of the bright spots in my day;-)