"It's still a way off. I don't know yet. Hopefully it will happen," she told E! News.
Oscar nominee Naomi and partner Liev Schreiber tend to fit their filming commitments around their two sons, so one parent is around while the other is working.
"I just can't travel again right now because I did a lot of travelling last year. It's been a big year and it's time for me to be home with the kids."
The 44-year-old described her new film Two Mothers as an "unconventional love story".
The story, which also stars Robin Wright, is about two best friends who fall in love with each other's teenage sons.
"These are two great female characters full of complexities who are dealing with that midlife point. But it's not just about sex and their ages," she explained.