This is both sad, happy, and disturbing. I love it.

@Drumb  
What about akwardness then…

@ShiiKra  
It might begin as adoption, then turn into marriage.

@ShiiKra  
I’ll take the marriage one.  
Though adoption… i trying to figure out who he should he adoptes by… Scootaloo’s aunts.

@phoenixacezero  
Nah I’ll take the adoption as canon

Pair of birds (with different species for the back halves)

Hey, you could do worse than marry into the hippogriff royal family.

Gallus:… Wait, isn’t that a serious step. I’m mean don’t get me wrong, i like you alot, but shouldn’t we take it slow and date each other and wait till we grow up, before we get married.  
Silverstream: … I meamt adoption  
Gallus: … oh.  
Silverstream: Though I’m willinh to give “us” a try.

@Jonny Manz  
She’s related to Queen Novo and Princess Skystar so she could very well be wealthy already but I like her “adopting” stairs into her family that way.
 
That actually sounds amusing. I like the idea of that perhaps being a myth in Griffon and Hippogriff culture.

@mjangelvortex  
I’m calling it now: in the future, Silverstream becomes fabulously wealthy, and so she decides to go into philanthropy, donating sums to build many buildings across Equestria, Mt. Aris, Seaquestria, and beyond. She’s fine with having her name nowhere in the building save for one place - the stairwell(s). That’s how she “adopts” stairs into her family.
 
Also, I know this isn’t exactly what you meant, but I can’t help but imagine that, based on what you said, that sometime in the ancient past, there were eagle siblings, and one took a lion as a mate and the other a pony, with that being how griffons and hippogriffs have a shared ancestry. 😅

@Jonny Manz  
And Rainbow Dash called Griffons half eagle and half lion. Both creatures have eagle in them. So, perhaps the show Hippogriffs could potentially have Griffon ancestry like they do in traditional mythology.
 
@Background Pony #3ABC  
Agreed.
 
@ShiiKra  
I don’t think that would be physically possible for her to do but eh, she can try I guess.

We need more art of these two.

@Lord Seraph  
But Tbf, the hippogriffs in FiM are stated to be part pony, part eagle (instead of griffon) by Twilight in the movie.

@Lord Seraph  
It would be beautiful and unique and Gallus would be a very doting parent, to make sure his baby never feels abandoned like he was.

@Lord Seraph  
A double griff.
 
Or a keythong.

If Hippogriffs are supposed to be half equine and half griffin in legend.  
What would a half griffon and half hippogriff be?

They should make out… What? I said make out! I know they’re teens >.>
 
Wait, is “making out” considered sexual?
 
Fine just kiss xD

You mean like, not getting yelled at by some old gruff with anti-social issues?!

Gallus will come the Hippogriffland for celebrate

Artist, I love you.
 
 
@DonMaguz  
And I love you, too.

Silverstream must become family with stairs!

hippogriffagriffs!

Yes Gallus. Become family with Silverstream. I wholeheartedly approve.

Silverstream: “I have a brother who loves going both ways.”

and someone will have the intentions to ship them in the sea….