Mike heard his dad's door open as a wave of cum poured out of his room. his dad ducked under the door now an amazing 8 feet tall with shoulders just wide enough that he could squeeze through. though that didn't end well as he inhaled and stretched his arms causing the door-frame to break. now Sam could easily pass through the ruined door frame "ugh, I really tried to squeeze through though it is clear that's an impossibility." stretching his arms, accidentally scratching claw marks into the hall walls. "oops guess that I'm gonna have to use to this, this week to get used to this new body." mike saw that his dads grey hair er... fur was brushing against the ceiling.
Sam then went to the kitchen, and proceeded to make some eggs and toast for breakfast. They both sat down and mike once again saw Sams mushroom head poking out of his jeans, it seemed that he was pent up as it dribbled down his cock smearing against the table. Mike then said "hey dad you OK". "not really my son, I kept wanting to cum but I needed to eat so now I'm pent up." Sam said. after they fished eating Sam proceeded to go to the living room and turned on the TV. he then picked an animal show that had the mating rituals of animals, but this proved to be too much as his dick grew fully hard reaching 2.5 feet. he then pulled down his pants just enough to release his dick and proceeded to stroke it.
he then cumed and cumed over and over, mike realized that whatever changed them must have given them a high libido. by holding it in sam had become pent up which is why he kept cumming. sams cum splattered all over the living room getting in every crevice. mike too felt his dick getting hard and pulled his grey speedo down and stroked his dick. he soon cummed and fished in under 30 seconds while sam was still going. mike then decided to open the front door and the cum ran down the porch and onto the lawn. it kept spreading, he was thankful that they lived in the suburbs. eventually, sam stopped cumming and said "I really needed that" they both saw the cum miraculously evaporate within minutes leaving only the typical musking smell.
of course, by this point their changes had finished so they could no longer smell the musk. the musk was the virus becoming airborne after being released into the air. the virus multiplies within its victim's testicles, which is why it transforms women but leaves men as nothing but carriers. course water is the moist coomon thing in nature to be recycled both humans and animals drink water absorbing nutrients the expel it through muiltiple ways. the virus attaches itself to the liquid in cum causing it to evaporate. at this point, the virus can now emanate from whatever surface was covered in cum. it then invades the female body through the nose and immediately changes the female genitals so it can thrive. once the virus does this it proceeds to alter the rest of the body to match causing the subject to cum after changing.
once the female has become fully male the virus goes into stage two. first, it increases the subject's genitals to an average of 2 feet. Although sometimes alpha anthros will have their genitals become even larger. it then finds trace DNA of the animals who once drank the same water at one point. it then proceeds to change the victim till they look like a mixture of animal of human and animal otherwise known as an anthro. of course, neither mike nor Sam nor anyone else would discover this for a long time.