"Yes! Miss Fluttershy, I sure hope that you invite Miss Arle and everyone else to your next picnic."
"Sure! I always had this with my animal friends as well. I'll be sure to have a huge gathering with your friends next time. I'll ask Pinkie to see what can we do." —— Shy girls meet together.
Maybe Flutters can introduce them to Coco and Marble Pie as well but well they can introduce their friends from each worlds with each other.