When she calls you a d*ck
Yeah, I guess that would make it tit-for-tat, wouldn't it?
But I still don't think I'd use the c*nt word, even at that. I'd call her a dog-faced, or horse-faced, bitch, or maybe a cow, or a hog, or a water-buffalo, or Hillary, or whatever I think might best fit how she looked to me at that particular moment.