Daenerys Targaryen getting raped by Drogo and her liking it... She's 14, with detailed descriprions of her boobs.
Outlander, a whole chapter of the male protagonist getting raped and tortured in explicit ways, the next chapter we start with the rape of a 10 year old boy also very explicit.
In IT there's a kid's gangbang, a group of boys taking turns on the only female protagonist.
Need anything else?