To tell you the truth, one time before this Chen had paired off with another Ran and like this time, when the children became older Chen abandoned that family.
After that, the older Ran found Chen but it was already living happily with the Ran from now. When looking at those happy faces she could only think in vengeance.
The Ran from before commited suicide by jumping off a cliff.
The other littles ones has been killed by a Remilia too.
For this Chen, the things are fine while she can enjoy this sweet way of life.
Chen: "With the children growing up I wouldn't be able to keep this life. I don't want it, nyannyan nyannyan nihao-nyaan ♪"
She won't go out to find food to her family. She will go out to find a new pairing. Going out while singing a song and hopping.