A role-playing evening at their place

"Well, I wanted to go to a role-playing evening at Kevin's tonight!" he said.
"At Kevin's! That pimply, fat boy? Jesus... He doesn't know what to do with a woman either!" came angrily from 'Kate'.

"..." the son said nothing at first.
Then 'Kate' spoke up again. "But that gives me an idea! Son, why don't you organize the role play evening at our place?".

"Oh! Do you think that's a good idea?".
"Sure! Just ask him!"

No sooner said than done. And so Peter arranged to meet Kevin and the role-playing group at his place at 7 pm.

"So Peter, now I'm going shopping!" said Walter and was almost out the door when Peter cleared his throat. "Dad, haven't you forgotten something?".