Sarah's daughter Rebecca and Martin's little sister Kate suddenly entered the room. They both looked at Sarah and Martin, yet they saw nothing wrong, despite the fact that Sarah's pants now held Martin's erection, and Sarah's large breasts were pushing out Martin's shirt. "Hey mom!" Rebecca greeted Sarah, who just smiled at her daughter.
Martin also smiled at his little sister Kate as she walked over to a chair and sat down in front of the TV. Rebecca's impressive D-Cup tits now sat on Kate's 10-year old chest, stretching her top to its seams. Martin couldn't believe how quickly his little sister had developed, he was so proud, she was nearly as big as he was in the breast department.
Meanwhile, across the room Rebecca was making a phone call, her tank top hung loose on an almost flat chest. All she now had were the nubs of breasts that were just beginning to develop.
Obviously, Rebecca and Kate had also been on a 'visit' down to Moriarty's lab, and he had switched not only their chests...but also their vaginas. Kate now possessed Rebecca's mature, sexually active pussy, and Rebecca had Kate's pre-teen 'snatch'. Martin watched as Kate briefly rubbed her new pussy through her skirt, but he thought nothing about it, it was normal to him.
"Wishing you had a boyfriend?" Martin laughed at his little sister, as he sat down beside her, his huge breasts jiggling. He then glanced back at Sarah, who was once more rubbing her erect penis and winking at him.
Martin was torn between talking to Kate and going into the other room with Sarah.
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