As Jenny looks over the costumes a shiny green one catches her eye. Pulling it out she can see that its a green colored Alien with three huge breasts and no mouth. She has always been into SciFi books and movies and laughs at the idea of a race with no mouth. Sure they might be able to use telepathy but what about eating. She smiles to herself and begins to put the costume on.
As she slides her legs into the costume it feels warm and kind of slick. She savors the feel of it sliding over her skin. Slowly she finishes sliding her arms and legs into it and getting it up to her neck, then she reaches back, and making sure that her nose lines up with the nose on the costume, she fits the mask over her head. As she finishes the costume suddenly seems to constrict becoming extremely tight all over her body, but especially around her head, then as suddenly as it started the tightness is gone.
Jenny sits still for a moment trying to figure out why she felt like that, then almost absent mindedly she begins to stroke her pussy with one hand. When she notices what she is doing she is startled at how good it feels, almost like she is touching her real skin. She starts to rub harder moaning as the pleasure builds and then one of her fingers slides into her wet pussy and she explodes into orgasm. As the pleasure subsides she looks down and sees her middle finger planted up to the knuckle in her pussy with her juices seeping out around it. She stares at it for a minute then begins to swear at herself in her head.
'Shit, I rubbed a hole in the costume, Arthur is going to kill me.' She thinks furiously at herself.
She stands up and walks to the mirror in the bathroom and looks herself over before taking the costume off and going down stairs to confess.
Looking into the mirror she sees that she has green shiny skin, curiously she looks closely at the skin of the costume on her hand and arms. It appears to be smooth, totally hairless, with a slick, almost slimy coating of some kind of oil on it. Glancing back to the mirror she sees that she now has 3 huge breasts, the third situated between the normal two with them just pushed out to the side slightly. The head of the costume is almost an oval shape with large slanted oval eyes, a slight bump with two holes for the nose and no mouth at all. The hair on the head is a light green and comes down to the shoulders.
She rotates slightly taking it in from all angles, marveling at how it makes her look so skinny and sexy, even with it's oddities. Finally she walks away from the mirror into the bedroom and reaches up to take the costume off. After a few minutes of groping around she grabs her compact out of her luggage and walks back to the mirror. She uses the mirrors to search the back of the mask for the seam and after a minute realizes that the seam is gone.
She tries to open her mouth to scream but cant seem to get it open, in fact, she cant feel or move her mouth or tongue at all anymore. She slowly walks back into the bedroom and sinks down onto the bed wondering what is going on. After a few minutes of quietly crying to herself she dozes off.