She had beauty, she had a lovely home, she had a loving husband who did business trips to keep them very rich, she was fit, she had very fit young daughters, she had two of the worst low-lifes come and visit.
The treasure is real enough but can the two escaped convicts co-operate long enough to dig it up when one is a psychopathic sexual predator and the other's wife is along for the ride?
The bonobo species of chimpanzee is famous for the constant sex with no relationship to procreation. What if it is the result of a virus that changes the apes' behavior for its own ends? When it makes the leap to humans, it makes women insistently seductive and turns men into rapists. The virus spreads with lightning speed and society is profoundly transformed.