When Harry says to him "Dada" ....thats one of "the moments"... or when he says to Harry "don´t touch her!"....
I liked it very much in general cause I'm aiming to write my own Snily fanfic and I have lot of troubles being stiff to write and also fearing the many haters that Severus has
(almost everyday I found on internet people that really get mad about him being in a Snily fanfic...)
Despite haters I will do it anyway....
So, I like to read Snily fanfic and see others people style and fluency in the way they write about them... also the capacity to make short touching stories like this one of yours for example, thats a great hability I really do not have
Well, your story is touching and inspiring and has a coincidence with I have planned on my mind and it concerns specially to "Dada" Snape and Harry
Hugs to you from Cecilia.