Made sense to me. I thought it was the guy making excuses and he says "Don't get me wrong I love you, but does that mean I have to meet your father?"
She answers ... I think its meant to be a sarcastic answer "When we(you?) are older you will understand what I meant when I said "no, I dont think life is quite that simple."
Basically I think shes saying "life/love isnt simply being with someone, you have to know them fully"
I cant explain it anybetter even though I know where I'm coming from lol :-S