All of my books have (fairly explicit) sex scenes and swearing (strong but infrequent). Animals never die, though they might experience the odd near miss. HEA guaranteed.
The Madness of Miss Grey
Suicide (attempted), mental health struggles (including depression), dementia, ableism/misogyny/sex shaming (by antagonists), power imbalance (doctor/patient relationship), abuse of patient by carers (physical and emotional), kidnapping and forced confinement, animal abuse (animal is ultimately fine), dubious consent. (Starting to see what readers mean when they say this book is dark!)
The Ruin of Evangeline Jones
Alcoholism (backstory), Gun violence, violence against women (off page, backstory only), references to child prostitution