How do Pamela and Bianca feel about the changes?

They are completely unaware.

As soon as the flash happened, Cindy blinked her eyes and shook her head gingerly. Something had happened, but she couldn't put her finger on it. As she descended the stairs she heard voices coming from Thomas' bedroom. She grinned as she remembered the other girls Thomas had given a cumgasm to, and opened the door.

When the door to Thomas' bedroom opened, Cindy smiled, thankful she had landed herself the sexiest cock in the world. Sure, she wasn't the first to have it...but she still had it none the less. Next she marvelled at how much bigger Thomas' room took up in the house. It dominated almost the entire second floor of the house. Aside from Pamela's and Bianca's former rooms, there was only one small room at the end of the hall with a blue block letter K on the door.

The giggles and sounds of the other girls in the room pulled Cindy from her reverie as she smiled to Bianca, Pamela, and Caroline...Thomas' three other women. Sure she was fourth in line in Thomas' harem, but she was still in it.

Walking up to Thomas, Cindy spread her legs and panted like a dog in heat in front of her man, his heart on her ass cheek clearly visible to anyone who happened by the open door. Her half lidded eyes found Thomas' and he grinned, stroking her puffed up, bald little slit. Cindy grinned back and leaned forward to kiss Thomas, happy with the way of the world.