David is 42 years old, married and has one child. They were away from home for work when he was informed of the outbreak, as he was close to the apartment where his widow mother, Janet (70), lived, he decided to stay there until the situation calmed down. He took advantage of being there and helped her with the housework while they listened to the news on TV, to know when the situation became safe again.
When they were almost finished Janet began to feel sick and put her hand to her chest, which worried David who knew very well about his mother's heart problem.
"Mom, did you take your medicine?" David asked
"I didn't take it. The medicine ran out and I was going to buy it, but I was told to stay at home due to the outbreak of mutations. I thought waiting until tomorrow would be no problem." Janet said
"It was just what was needed to get in the way, the remedy was to end right now. You must be having a heart attack," David said before calling for an ambulance, but when he was told they were being overloaded and couldn't guarantee that they would be taken care of anytime soon, he decided it would be better to risk it, he was going to take his mother to the hospital in person.
Janet's condition was getting worse and David left carrying her, intending to take her to his car, but he came across the floor of the white hallway, covered by a layer of a thick white liquid that came from upstairs by the stairs. The smell left no doubt that it was cum and the amount made it clear to him that it was cum from someone who had mutated. His mother's situation was very serious and she needed care as soon as possible, so David was forced to face the corridor full of material contaminated by Mutation Liquid, knowing he would be safe as long as they didn't ingest any of it.
David walked carefully, but the ground had turned a lot smoother than he expected and slipped, falling and letting his mother fall. The fall hurt Janet, who was now moaning in pain with a fractured hip and arm, but the fall had also spilled some of the cum and she swallowed it.
"Not this one. I'm sorry mom, I slipped." David said, but he heard a crack sound coming from his mother. He got worried and walked over to pick her up, but there was a second crack as her broken arm straightened, instantly healing. The pained expression on Janet's face disappeared and he asked "Are you okay mom?"
"I'm great, My broken hip and arm are brand new and my heart attack is gone. I actually haven't felt this good in years." Janet said getting up.
"This is weird. You didn't swallow some of the cum when I dropped you did you?" David asked
"I think so, I was so bad I couldn't even pay attention. I just remember something entering my mouth and there is an aftertaste that... it's very likely that I swallowed it." Janet said, with her transformation already underway. Her wrinkles disappeared and her skin was smooth, her white hair was black like it was when she was younger.
"Mom, just look at yourself." David said to Janet, who had become much younger.
Janet went back to her apartment and ran to the bathroom, where she looked in the mirror and said in wonder "Wow, this is amazing. This Mutation Liquid shouldn't be that bad, this look of mine is the one I had when I was 19 years old."
"So far you've been lucky, but I don't think it's over, it's quite likely that you'll change even more." David said
"There's no problem with that, if I hadn't been infected I probably wouldn't have lived until tomorrow, now I'll probably have many years of life ahead of me. No matter what happens to me, it's better than being dead." Janet said, turning back to look at her son just as her vision changed, since a second pair of eyes opened above her original ones.
"Mom, your eyes." David said
"I know, I have more of them now don't I. There's something on my ass too." Janet said, turning around and making it visible that her skirt was being lifted from behind by something that was growing there, something that soon slipped out from under the fabric and showed what looked like a huge spider's abdomen. As expected her panties were destroyed and fell to the ground. Her legs split into four longer, slender pairs, so that her lower half had fully turned into a giant spider. "Did I become a driver? Not bad, I kind of liked it." she said, lifting her skirt to see where the human part and her arachnid came together, so not only she but David saw her transformation complete with a dick, which had already grown hard, and balls appeared between her front legs.
"Looks like you stopped changing, isn't it Mom? Good thing you didn't become a freak incapable of having a life." David said, in the relief that his mother came out of death's door by being contaminated and liked what she's become, he forgot that mutants have high libido and tend to have a strong desire to infect other people.