Or uncle.

@Joshua
 
Assuming genetics works similarly in Equestria to in our universe, Unicorn-ism and Pegasus-ism seem to be recessive (as Earth ponies can have unicorn and pegasus children), which would mean that a Pegasus or Unicorn couple could only have a child who is also a pegasus or unicorn (respectively). We don’t know of any canonical mixed-race couples with children (apart from Shining Armor and Cadance, which is an exception because Cadance is an alicorn), so we can’t actually work out if this is the case.

@Sandblast  
OMG YES  
MIND = BLOWN

@Background Pony #3599  
Words cannot express how much I’ve come to hate that scene in “Baby Cakes”.

Lightning Dust

@Tragiclady  
heh Thanks :D

@McGack  
If it weren’t for the fact that pony family members oftentimes look nothing like each other, I could really see that character being part of Fluttershy’s family :D

@Joshua
 
Only because Mr. Cake got cuckoided.

 
The first Zephyr Breeze (not mad)

So much teal!
 

Things like this make me wish there was a standardized “probably not” tag we could hand out every time someone uploads a crackpot headcanon theory.

@Evilworld  
Flutterdad looks like strawberry and pistaccio and Zephyr like mint and vanilla ice cream

Just because ponies share the same coloring doesn’t mean they are related.
 
I keep thinking Tender Taps is actually Scootaloo, so I’m a bit guilty of it too. D:

As an aside, it’s interesting how few green ponies there are.

Naw it actually the season of minted green pony.

“Fluttershy’s Bro
 
Fluttershy’s Dad
 
Fluttershy’s COUSIN?”
 
Not likely. Fluttershy’s family appears to consist of Pegasi, and the spa pony is clearly a Unicorn. Then again, the Cake Twins were born from Cup Cake, and she’s an Earth Pony; so what do I know?

.jpg!