Taken By The Demon Lord (Forced and Taken Vol 1) by Ken Rander
Approx. 9,750 words.
Published on June 16, 2013.
Susan accidentally frees the Demon Lord Geldarath
He processes her and wants to breed her to obtain a new body
Using mind control, he controls her body. Susan doesn't want to be bred but she doesn't have a choice.
Geldarath's enemies want to torture him and kill him, which means killing Susan to get him.He has to keep Susan alive long enough to breed her.