Perhaps you recognize this is the last panel from my Father’s Day series. I’d planned to make this little sequence from the start, but I was sure to put my efforts to having something finished to put up in a reasonable amount of time after Father’s Day had already passed over having this little sequence finished.
 
I figure Fluttershy still has her old foalhood bedroom in her parents house, but Mac offered to sleep on the couch to be a gentleman, or perhaps because both he and Fluttershy are too embarrassed to admit to her parents that they’ve been living with each other and sharing a bed for who knows how long before Fluttershy finally introduced Mac to her parents. Either way, Fluttershy got lonely and sneaked downstairs to join Big Macintosh on the couch.
 
The single panel can be found here:  

 
And compilation of all four parts of the story can be found here: