Why can't fillies read mature books? · 1:53pm Mar 9th, 2019
You’ve seen Sweetie Belle read a book about magic and even put it into practice. Yet her newly gained craving for knowledge still isn’t quenched. The books in Twilight’s library are enticing her. Who cares if they’re mature! Will she answer the call or will Twilight meddle in her affairs again? Find out in the latest chapter.
this makes me think of
The Sweetie Belle Connection by TheGreatEater
5025558 In that case, let's hope Twilight stops her before Sweetie Belle grows a dick like in the story you mentioned.
5025565
And makes everypony into her... Concubine