A responsable parent, confident in their marriage, would have answered something like this:
"Of course I am! What gives you the impression that I am not? Do you have something on your mind concerning me and you father? Do you want to talk about it?"
But here’s how Sakura reacted:
Of course. She’s agressive and violent toward her daughter without even trying to talk to her or even comfort her. Such a great mother. Also, it’s funny how sensitive she can get when being questioned about her "marriage". Not suspicious at all…
"Sorry for raising my voice… It’s just… your father is away on a very important mission right now. He’ll be back before you know it"
If it’s that simple, what couldn’t you explain it calmly to your daughter? And seriously, "He’ll be back before you know it"? Do I have to remember you that SASUKE DIDN’T VISIT YOU AND YOUR DAUGHTER FOR THE LAST 10 YEARS???
(Oh and sakura destroyed her house without intending to. Whoops)