Marines. He wanted nothing to do with that bizarre day of sex when he fucked his sister while both were dogs. Now she was pregnant?! He wanted to leave, get the fuck out of the country and deny any connection to this bizarre sexual experience.
Basically it had turned Cal from a guy who banged a different girl every weekend, who smoked pot and drank beer to a God fearing, sober US Marine. Katy knew better than Cal, they were bonded by the first trans species sex to happen between humans. If she needed more evidence of their tryst it was a growing bump in her belly.
Cal found that the closer he got to her the more sharp his canine teeth became, the his pubic hair became long and started to spread up to belly button. So he had avoided her like the plague but she wasn't finished with him. As he walked into the otherwise empty bathroom at the Marine base.
He could smell his sister but was still shocked when she spoke:
"Don't you want to say goodbye to your big sis before you leave?"
Katy stepped out of the shadow of the furthermost cubical wearing a beige three quarter length buttoned coat with bare feet. Slowly she unbuttoned the coat pulling it back to exposing her breasts that had pushed forwarded and sagged down with milk as they prepared to feed another being. Then the bump itself, even Cal knew her pregnancy was going faster then it should. Two months into her pregnancy and already she looked close to halfway due.
Their fuck fest had already rapidly changed her body. She looked at herself in the mirror, a woman with redhair, this but with breasts that had grown to full blown b cups, nipples that stood a half inch out from the rest of her breasts. A belly that now protruded from her body no matter what she wore with her belly button not yet popped, but close to it. Like a coke can that had burst from its original shape and wouldn't sit straight.
The dress hit the floor and now as naked as the day she was born she walked over to Cal. His dick betrayed his thoughts of disgust, it was pointed at his big sis and even with his sharpened senses he could feel and hear the stitching of his crotch start to tear.
"You need to go..." he growled.
"You're not gonna say goodbye to your pregnant girlfriend? I'm not some Vietnamese hooker in a war movie Cal, I demand your attention."
He tried to leave, remembering that he had a full bladder from too much coffee, when Katy jumped in front of him. Her breasts wobbling, yet he was amazed at her nimble movements she moved faster than any pregnant woman could. His dick was throbbing and Katy's hands were clawing at it, her nails becoming sharp and pointed as his dick ripped his apart his jocks. His dick was a furry sheath and the lipstick was fully out as Katy's mouth engulfed it.