Best I can explain this I know I saw it but have literally I mean it literally searched high and low and haven't found it again.

Its MLP (not super into it but was pretty darn unique and kinky xD)

I believe it was Derpy Hooves delivering eggs, and she had them in her ass, then delivering them she positioned them anally to the zebra (may be incorrect) but thats what I remember and I've searched all the above and everything inbetween and never found it again.

Any help would be awesome.

It's called Derpadoodle Delivery and it's a part of Doxys PoniParade afaik.