Him, Mom, and Sister; Sexy Virus

Purple smoke was drawn into Bill's lungs. He felt his lab coat loosen as his fat began to reform into muscle. His stomach was in agony as he slammed onto the floor. As he got up he was disorientated. He stood up and shaking walked towards a mirror.

"Was the floor always this far away?" He asked, his voice deeper than usual.

The picture that reflected back at him was blurry. Removing his glasses his vision vastly improved. His chiseled features and blonde hair made him unrecognizable. Closest comparison would be a young Chris Hemsworth.

He lifted up his shift to reveal his 6 pack. Curious he pulled out his penis, it was a couple inches longer and semi-hard. "Women would never resist me," Bill said, "Time to find a prom date."

Meanwhile, downstairs a similarly purple gas floated across the breakfast table. Bill's mother Georgia was talking to his sister Brigitte about dressing more conservatively.

Bill's mom Georgia was in her late 40's but kept fit. Her hair was long and black ,though she dyed it, but always in a ponytail. She was wearing mom jeans and a crew top. She was always a kind woman and dealt with each of Bill's fumble with tact.

Brigitte was a College Freshman on summer break. She wore a tight blue tube top and black miniskirt. Her shoulder length hair was brunette.

"I just don't see the point," Georgia said, "Why do you feel like you need to dress like a harlot?"

"Stop slut shamming, Mom," Brigitte said, "I am comfortable with my feminity. It's my choice."

As they argued the gas was drawn into their lungs. Both fell to the ground. Their pain was somewhat similar to Bill's though they moaned in pleasure as their bodies began to morph.

Georgia grabbed the kitchen island to pull herself up. 25 years had melted off her age. Her hair was no longer terribly dyed black, instead long and blonde. Her skin was soft and smooth. The clothes she wore were no longer as that except her top where her breast perked up in defiance of damage gravity had done to them.

Brigitte recovered as well though her changes were less drastic. Her hair was long and silkier. Her panties peeked from under her skirt as her ass expanded and her legs grew longer. Her breasts pressed rightly against her tube top, nipples poking through.

"What happened?" Brigitte said, "I'm a slut!"

"I'm gorgeous," Georgia said, "Bill! What did you do!!!?!"

As Bill made it down the stairs the woman began to sniff uncontrollably. He knew had a limited time in his new form but already he knew that the changes were more than just his appearance.

"Hey there hot stuff," Georgia said putting her hand on Bill's abs.

"Don't hog him to yourself," Brigitte said, placing an arm onto his shoulder and moving in to smell his neck.

"You girls have changed," Bill said, "I would love to have both of you on my arms at prom tonight."

Note: Reader request by lordsomno