if there are times you feel like you have to force yourself to finish a story, might i suggest writing some shorts? she's banging a dude and he cuts her throat suddenly before climaxing, or like she's in a horrible car accident and wakes up from a coma after months to realize the doctors have all been using her but they give her a lethal dose to keep from getting caught when they notice she's awake. etc. idk, short little stories like that to keep your own excitement going