Lisa continued typing away at the keyboard, she wanted to make sure she got every detail the way she imagined it should be. Finally the tapping of keys ceased and Lisa nodded with approval at her work. "Yep, that should do it. Now here we go!" Lisa exclaimed while hitting the enter key as Eric watched and waited to see what Lisa had chosen.
Lisa sat for a moment, her breath heavy as she could feel the changes race up and down her body. Before Eric's eyes, Lisa's entire body began to shift, like it was an image in the computer. When Eric watched Lisa's entire body shaken, she aged and grow into some 20, no 40's year old woman. Her hair, which was shoulder length and light blonde, was now growing a quarter way down her back, turning a deep brown, and appeared to be getting wavy. Next her breasts, which increase from a nice B cup to a full E cup and spread a lot of milk. Along with her chest, her skin seemed to get darken a bit from a tan. Lisa's whole body had become more toned. Eric stared wide-eyed as he looked down to realize Lisa was no longer a teenage girl, but some 40's years old women.
"You changed yourself into a MILF?" Eric gaped, but Lisa cut him off.
"Just wait a bit more, that's not all," Lisa grinned through the strange sensations as her voice began to drop. Then she felt her face begin to shift slightly, and closed her eyes as her internal organs joined in the act. Eric couldn't believe what he was seeing. Just as he thought the changes had finally ended, a quick ripple passed through Lisa's clothes, changing them as well, and the ripple seemed to flow out of Lisa and through the entire house. Finally, Lisa opened her eyes, and Eric realized to his shock that he was looking at a picture-perfect copy of his mother, down to the clothes.
"Lisa?" Eric asked, unsure.
"Better call me MOM now," Lisa said in a voice which matched Eric's Mom perfectly, "Honey!" At that second, a string of memories poured into Eric, memories that hadn't existed before that moment, and which Eric knew weren't real, but were as detailed as any existing ones. Memories with his mother and him kissing and make love for each other, and who he was closer to than anyone else in his life. However, at the same time, Eric also knew that until a few seconds ago, his Mom had been his girlfriend Lisa for entire life.
"This is ...so weird ..." Eric began, not certain what to make of the sudden changes.
"Now, now," Lisa... or rather his mom cajoled, walking over to Eric and pulling him up from the bed. "Just think of it this way, now we get to spend a whole life together, just you and your MOM, nobody else."
"Wait,... Mom?" Eric questioned.
"Of course," your MOM explained. "I changed everyone's memories for the week so everyone thinks we're only mom and son around the house, only you and I know Lisa exists. Of course, now you get to have your 'girlfriend' with you 24/7."
"I can't believe this," Eric exhaled, still staring at his mom body.
"Better believe it, my son," she grinned, then pulled her clothes over her head to reveal a full breasts with some milk came out on it. "And we have a week to make the most of it, so let's get started." She pulled Eric close, then kissed him tenderly.