Smack her ass

Paige crept over to the side of Phoebe's bed and whispered, "Time to get up, sweetie."
Phoebe didn't move.
"Wake up, slut," cried Paige as her hand crashed down on Phoebe's barely covered right ass-cheek. Paige's hand stung as she retreated out of Phoebe's reach.
"Oww," moaned Phoebe opening her eyes. "What was that for?"
"Eh, consider it a gift," replied Paige. "Now get up. Piper almost has breakfast ready."
"I'll be down in 15 minutes," said Phoebe rolling over.
"Awe, don't worry," said Paige. "I've got one for that cheek too."
"No, I'm up," yelled Phoebe as she sat up in her bed.
"Good," said Paige as she left the room.