I didn't read it as that at all, but you've given a good reason to understand why you'd construe it in that context.
To me it was more like this: Donna Troy was being honest. Her family was her most precious and untouched memory she could possibly own. It was the last time she was truly happy in life (which is why I think she couldn't go back to Kyle - too much had changed for her , and not in a good way). The Black Lanterns are created from your memories --reanimated, but not real. Krul said so in a podcast, so ...
Donna remembers Terry on their wedding night. Probably back when she believed her first love would last forever. Donna remembers Robert as an infant (though Krul admitted that was a mistake on his part at first), and now she won't be able to think of her family without recalling this night. Her family was always a painful but happy memory she could reach in her heart, and now it's been fucked up because of this.
It was just an angry and hurt statement, and it's why she wanted to get rid of that zombie!Terry so badly and had such vehemence while doing it. She didn't want it to taint his memory even more, because all of the innocence in all of it was dead to her.
And it's why she almost broke down while doing that to Robbie.