Guys' vacation with Pseudo Alison

Walter had rented a small apartment for himself and his son in a holiday resort. First, the two men went to their father's holiday apartment.
Hardly had Walter and Peter arrived there than Walter told his son about his perverse-perfidious plan.
But of course that was only after he had spent almost half an hour on the toilet.

What is he doing in there? Laying some cable? Masturbating?
Finally the door opened!
"Ah, son! There you are at last! Well, in the next 14 days you will be deflowered! And if I have to, by me personally!" sounded Walter cocky.
"Okay, and how do you... Oh no, now don't tell me the iBod again!" came annoyed by Peter.
"Yes, and I've prepared something... I'll be in the bathroom for a moment!" said Walter and disappeared into the bathroom.

A minute later the bathroom door opened again.
In this now stood an attractive young blonde with long hair.

"And did I promise you too much?" came from her in Walter's masculine pitch.
"Alison!? You're not serious, Pa!" exclaimed Peter in disbelief.
"Well actually still Walter! And right now I look like Alison from your grade, yeah!" she grinned at him.
"Dad, that's kinky and downright kinky! I mean, you can't... I mean, Alison is a classmate! You can't just hop around in her guise for two weeks!".
"And how I can!" chuckled 'Alison' presumptuously.