Rae is having her free time in the jacuzzi, Sonya is cooking.
It's a relaxing girl time, but there's an uninvited guest.
A parasite just enters into Rae, parasiting her brain and controlling her mind.
Sonya is aware that Rae is infected, she tries to call for help, but is too late.
Rae jumps on her, the parasite infects Sonya too, with both girls having the best lesbian - mind controlled - sex they ever had.