Part 4 of the epic saga of Fluttershy taking Big Mac to Cloudsdale to meet her parents. Is it not exciting?
 
Dinner went long, and Big Macintosh and Fluttershy missed the last hot air balloon back to Ponyville for the evening. Mac and Fluttershy were invited to stay until the morning, and Mac was put up on the couch. Surely Fluttershy still has her foal-hood bedroom at the home (assuming Zephyr never did anything to it) but she seems pretty happy on the couch.
 
Part 1: Arriving in Cloudsdale  

 
Part 2: Meeting the Folks  

 
Part 3: Mac’s Imagination