Nick is your ex husband. And he had custody of your little girl Kate, and since you worked in the military you never saw her often until….. Nick showed up with Kate and confronted you about not seeing her. And he and you had a argument

“COME ON! She’s your daughter too! I don’t care if you’re working, I have a important meeting to attend in a hour! So your gonna take her!” nick said firmly as he was close to you