Was she getting content with the peacefulness of being alone and just thinking all of the time? Partly but in some manner she was also trying to learn parts of her past self to see what more she could learn or want to discard to move on from, since it was all not ingrained in her mind.
But a part of her wanted to give up the search and just learn over time naturally now who would Nemo be here as a person? Not just forever lingering thought about losing some one, Maybe her motherly, Big sister protective mind could be used for other things better then just sitting on nothing.