Erotic Space Invaders

During an ill-advised morning walk, Mallory and Krystin are whisked aboard an alien scout ship and subjected to very intimate bodily examinations. Mallory becomes so hysterical at their methods, the aliens put her in a section of the ship for her to calm down before the make another attempt with her. Undeterred the aliens resume the examination on Krystin whose reaction is exactly opposite of her girlfriend's.
On the contrary her exuberance about the alien females' attentions makes it difficult to tell who the captive is and who is the captor. The two aliens, Demi and Tassa do their best to see that Krystin is given an exam to remember leaving no detail not examined... After several intense hours of checking the human female from top to bottom, inside and out, Krystin has left the two aliens exhausted and withdrawing for a place to rest.
Krystin is tranquilized before the aliens leave and wakes up in the same holding area as her friend Mallory. Both are shocked that the other is still alive. When Krystin relates the sordid details of her 'intimate' examination by the aliens to Mallory, her friend is eager for the aliens to come and take her.