Parasites Love Earth! ~ Gary LM Martin
This is the sexiest erotic scifi horror novel ever. A ship crashes on Earth carrying the most dangerous parasites in the galaxy, including vampires who can drain peoples’ genders, plants which take control of the human reproductive system, and pancake like creatures who can take over human minds by riding on peoples’ backs, and make them produce alien lifeforms of their own.
Major Samantha Arden and Colonel Jack Sullivan of the United Survey Service must stop them, while coping with their own feelings for each other. When Sam gets Infected with a rider, Jack must make the biggest decision of all.
Note: This book has very explicit situations, mind control, alien impregnation, and adult family members having relations with each other.