So naturally I have photoshopped her to look pregnant.
I've attached the finished images in this post and below I'll be linking the source images I used.

   
   
   
   
   
   

Mackenzie source images:
http://imgur.com/OaGgVtl
http://imgur.com/myXQtCA
http://imgur.com/ufpSPPO
http://imgur.com/cakm1Fr
http://imgur.com/lk5BOAc

Belly source images:
http://imgur.com/hnuO1oZ or http://imgur.com/XcJZ2HQ (I don't remember which) (google "CandyK" for her awesome videos on YouTube)
http://codaman.deviantart.com/art/Heavy-Haul-302506638
http://imgur.com/PySV7cg