A small detour

"And in order to do so, I will turn myself into... Emma Watson! But first I need to undress!".

"Haha, sure!" both Peter and Jacob laughed at him.

"Ready to see me change?" he asked them once he was undressed.
"Sure! Haha!" both said.

Next, Walter aimed the small device at himself, pressed a button...
And suddenly there was a bright flash, then a pink cloud formed around Walter, which then totally blocked everyone's view.

"Oh God. What's that smell!" Peter gagged, covering his nose.
"That's horrible, kinda smells like a beaver, I think." Jacob agreed.

Once the smoke cleared a little they saw a female figure in it. Finally they were able to make out who it was...

"Emma Watson!?"

A few seconds later she looked at them, with the smoke gone completely.

"And, did I promise too much?" she spoke, albeit sounding like good ol' male Walter still.

"Woah!" is all Peter brought out.

"Wait, you are Emma Watson, but why do you sound like our Dad? And also, do you wanna see my magic wand?" Jacob asked a bit dumbstruck.

"Jacob, when did you become so stupid? I have two doctorates, and you are such an idiot! Of course it's me, your father, didn't you listen to what I said earlier?" it came from 'Emma' fuming.

"Oh, oops!" Jacob realized.

"Dad, this is awesome! But do you think it is a good idea to turn into a feminist while running around the place all in the buff?" Peter suddenly brought up.

Now 'Emma' looked at him dumbstruck!

"Damn, I have never seen it from that perspective! Guess you are right there, son! I should assume the appearance of somebody else then who is not such committed! Maybe a blonde bimbo or something...".

"Yeah, and also fix the voice!" Jacob interjected.

Now Emma AKA Walter pondered for a minute or two.
Finally she had an idea, hushed a mumble "Ah, now I know whom!" and began to manically press a series of buttons on the device.