I'm looking for a Power Ranger Fanfic story?

I'm trying to find a power rangers fanfic that i had read a couple of years ago. It featured Kat H. and Billy as a couple but almost all of the rangers had gotten married. The children of the rangers take up the ninjetti powers with more powerful versions of the original ninjazords. it also had tommy's clone as the new green ranger in command of an updated Dragonzord. This was a multichapter fic and the last chapters were the invasion of earth similar to Countdown to Destruction. Any help would be greatly appreciated.