SPOILER. . .
In the original timeline, Natalie appears to escape the carnage at Collinwood, and I assume she returns to Martinique where she meets back up with Andre and lives her life quietly but sadly.
And I always hoped that Natalie and Joshua were able to set their grief aside for a while and had a quiet affair. I think they both needed the comfort--and the pleasure--after all they had been through.
Love, Robin