Congrats on your new niece/nephew
I also vote for a happy ending because I am an absolute sucker for a happy ending!
Oops, forgot to mention I have another niece.
Good endings all the way! Or you could do both, just to satisfy my curiosity 
I will share some snaps of how the Bad end would have played out in an extra chapter

I like the idea of two endings, sort of like a choose your own adventure. And congrats on the new family member!
I've always loved the options of good/bad/happy endings from playing hundreds of choose-your-own-adventure and otome games

So, Good end is the winner - sorry little sis

I'll be working on it in the next few days.