Immortal Enemies

Marissa Mahoney is a hopeless romantic. She has been warned that keeping Mario, her live-in pool boy and landscaper, full-time for 5 years is dangerous! What if he is an SASHA? (Seek And Save Humans from Aliens) agent?
Marissa ignores their warnings of being captured by SASHA! Captives always die from scientific experiments to find out their secret of immortality!
Unfortunately, time is not on her side! Marissa needs to regenerate soon or grow old and die! Her choice is clear: she must spend a month or two at the SAROS (South American Regenerist Organization Spa) or have the procedure at home.
Dr. Carl Sanderson, head of RAPT(Regenerists Are People Too), and Francesca Montenegro, Marissa's new housekeeper/nurse, have agreed to care for her at home and are caught in the middle of a dangerous game.
Mario loves the abundant sex plus a secure paying job. He is looking forward to his bonus when he turns over his video evidence of Marissa's regeneration in living color! He will be a celebrity when he reveals how the regenerists draw energy from humans! Mario is so sure of himself! He and Francesca are playing a who's fooling who game. Mario is looking forward to this reward when he betrays Marissa to SASHA.
It is up to you to figure out the difference between the bad guys and the good guys!