You feel someone lifting you out of the box, but you can't see who. They unfold you and start breathing air into your belly valve. The air feels warm and erotic as it starts to fill you, forming you into your new shape. As you become less limp, you begin to see a couple of flesh colored mounds coming up into view. You're perplexed at first as to what they are. As more air fills you, the nipples become obvious, 'When did I become a girl?' you ask inside your head, not really concerned.
As even more is breathed into you, you feel even more aroused. You begin to notice more of your body, starting with your new plastic slit. As pressure pushes the walls of your new pussy together a nearly orgasmic pleasure builds so much you want to yell out in pleasure, but your newly latex body makes no noise other than any other love doll being inflated does. The pressure and sensations increase breath after luscious breath fills warmth into you and pleasures your pussy. 'Screw me!' you mentally scream in an oddly more feminine voice. You want nothing more than having your pussy penetrated. You feel your arms gain definition, but notice an odd feeling that you have only a mitten for a hand. This is confirmed as you see your arms rising up ready to embrace your new lover. You feel your legs and feet, and the feet feel as though you only have the equivalent of socks. This is quickly pushed from your mind as you begin to feel full, and excitement builds on top of the pleasure as you realize you're very close to being ready to use. 'Use me master!' you think in a sultry voice. Your head begins to lift up as your now has enough PSI to support your head. You see your new owner come into view. 'Wow,' you think, 'you could be a model!' as you revel in his handsomeness. Just a couple of puffs after thinking that you are filled completely. Large DD breasts, an 8 inch waist, a bubble butt to die for, and a nice feminine, if a bit cartoonish, face rounds out your new body. 'My body is yours take me!' you call out inside your head.
Despite your current high opinion of him, just earlier today you hurled insult after insult at him for being a 'Fat-ass loser' merely for your own entertainment. He was an extremely nice guy and asked Santa for only two things: female companionship and for just one person that insulted him for his weight to love him for who he was. While he never would have endorsed your transformation, Santa thought it fit you well to give him both through you.
"What a lovely doll!" he says as he pets your leg. 'Oh, take me!' you mentally call out. Soon he moves your body and you see your box, it now has the lettering 'Santa's Little Helper Love Doll'. You would've been struck by the novelty name, if you weren't so horny now. He shortly after gives you what you've been desiring the whole time, and fills your plastic pussy with his dick as you are taken on the most orgasmic ride of your life. "Wow." he says as he is done with you. "If only you were a real girl!"