I listen to a podcast on ASOIF.
https://notacastasoiaf.podbean.com/
In their most recent episode, they were discussing one of Dani's later chapters in GOT. This was the one where Kal Drogo sustained his wound, that ended up leading to his death. This is also the chapter where Dani meets Miri Maz Dur (the healer/practitioner of blood magic).
Something that was mentioned in the episode that was interesting to me.
Per the podcast, Kal Drogo, and his Kallisar attacked the city of the Lamb Men (Miri Maz Dur's people), in order to collect people to sell as slaves in the free cities. The plan was to raise money to buy ships to help Dani get back to Westeros and retake the Iron Throne. Granted, Dani had no control over that situation, and her motivations can not be questioned there. But, I always thought that the Dothraki were simply looking to expand their empire and enjoyed fighting/killing. I never realized that Kal Drogo had ulterior motives. But it does make sense, because in the prior Dani chapter, he said that he would help Dani get the iron throne after she was nearly poisoned.
However, that event clearly affected Dani, and influenced her to fight against slavery in the later books.