Transforming while the women are away

A day later, Walter had arranged for a family meeting. Luckily, his wife Rebecca and his daughter Sandra were away on a week-long trip, which meant it was only his boys in front of him!

"Hi boys, I got an announcement to make! For the next few days, I will be doing a trial run of my newest invention!" he announced.

"What are you testing?" his youngest son Peter piped up.
"I'm testing a device that allows me to transform into other people. I know it works, but I need to make sure it lasts, that it will work for a long time." Walter explained and added "Anyone in particular you want me to turn into?".