Matt had never like his sister, although they had been different ages from one another they were so alike that it didn’t even matter. Matt couldn’t get either of them to bond with him, instead like everyone else they treated him poorly. They ignored him, more than any other member of his so called family, his sisters were the most apathetic. So focused on their bodies that they could never see past themselves, so it was only fitting that they share in his mothers’ punishment.
Matt walked up the stairs heading to the second floor, where he sisters and parents kept their rooms and personal belongings. As he climbed the stairs Matt thought of all the ways he would make them suffer through their coming transformation; fast, slow, partial, mind-breaking, there were so many different ways for him to get his revenge. Once he was at the top Matt walked towards the Jack-and-Jill bedroom set on the far side of the house, where his sisters rooms were at. Lisa’s door was open so Matt thought he would start with her.
Walking through Matt saw Lisa asleep on her bed, her TV still showing whatever benign show she was watching. When she was asleep she looked so innocent, it was almost enough to make Matt stop. Until he thought back on all the things she had done and then moved forward. Like before he willed forth an image and gave it a set of guidelines before looking on his work.
It was much slower on his sister than on his mother, her skin started creeping towards a pinkish shade, and her form started slowly gaining weight. Matt supposed that Lisa was lucky, she was wearing only her panties and a long shirt, meaning the mess would be substantial less. Lisa started to toss and turn in her sleep, her night time breaths turning into grunts and moans, she reached down and started fingering herself. This had surprised Matt, but he was rolling with it. Harder and faster she started to thrust into her moist nether regions, and as she did her skin turned pinker and she steadily gained weight. He could see the sweat clinging to her small form, making her panties see through and on the ass of his sister a nub started to form. Lisa let out a loud grunt and thrust her hand deep inside her, and as she did her fingers started to shift and change, her face slowly started pointing outwards and her eyes became pointed at the ends.
Matt was so absorbed in watching Lisa’s’ transformation that he never saw Ashely walk through the shared bathroom. Ashely had walked through concerned about her sister when she heard moans and grunts, so walking through the bathroom she went to check on her. Matt finally noticed his older sister when Lisa let out a pig like squeal and removed one pig trotter from her vagina, covered in moist juices. Ashley saw this and opened her mouth to scream, but Matt couldn’t let that happen so he willed what Lisa was going through to be arousing for Ashely and to cause her own transformation. Ashely’s mouth fell and her face became dazed, she looked around for a moment before her eyes landed on the transforming Lisa. Her eyes gained a lustful glimmer and she moved towards her little sister, whom now had a small snout forming and was gaining more teats. Ashely bent down and captured Lisa’s mouth in her own, the small snout barely being a blockage. They kissed deeply, and Ashely removed her clothes, her young adult female form showing in all its glory. She then took of Lisa’s clothes revealing her partial transformed body, with nary a thought she cupped one of Lisa’s many growing teats and started to fondle it. As she did so Lisa let out a moan into Ashely’s mouth, whose skin started to turn pink.
Ashely responded with a thrust and pushed her hand deep into Lisa’s cunt, juices dripping all over. Lisa let out a loud squeal into Ashely and thrusted forward her other hand hardening and she did so, her panties snapped under her increased weight and she started to push against Ashely. As she masturbated her sister Ashely herself started gaining weight, small at first, but soon rolls of fat dominated her body as well as deep pinkish hue. She was making out with her sister when her own snout started bumping against Lisa’s almost complete one, she grunted in frustration. Suddenly grabbing her sister and throwing her on the bed Ashely started humping against Lisa, as her hand pulled out of the now piggy cunt, hardened and black. Moving to align their vaginas Ashely started thrusting into Lisa letting out squeals and grunts with every thrust. Soon Lisa fell forward on top of Ashely and as her arms and legs readjusted became a full pig. This didn’t stop the half-pig Ashely she kept thrust and moaning even as her own snout came into fruition, and her hands and feet became trotters. Soon she was too big and flopped against the other pig’s side, her eyes looked to glim with intelligence before they dulled into a dumb brown. Soon two sows sat side by side on a ruined bed, grunt and squealing as they thrust into the matrices.
Matt smiled, three down now, only two more to go.