>>29475995I'm pretty sure you can google around FFN for some good/bad eeveelution fics here, especially the NSFW ones.
Of the ones I've read. I think this piece involving Vaporeon seems to have some good quality going for it.
https://www.fanfiction.net/s/11730004/1/Little-Blue-DevilAs for ninetails, well, have pic related.