Her evil sister left poor Pammi hogtied on her bed while she hunted for the letters. A pair of her sister's dirty panties wadded into her mouth held in place by a bandanna wrapped round her head muffled her cries for help. The only sounds emanating from her mouth the "mph mph" of the helpless captive.
The ropes were so tight! She wriggled and writhed as best she could but the chafing of the ropes on her wrists was making her skin sore. And as she struggled the strain from her legs pulled the rope on her wrists even tighter cutting off the circulation and making them numb.
Her hands flapped helplessly behind her back and her shoes squeaked as patent leather rubbed on leather.
The buttons on her pretty blouse strained from her ample bosom and she was worried the buttons might "pop pop pop" and leave her in a state of undress which would be so embarrassing when her sister returned. They had always been adversaries and Pammi knew that her sister would enjoy her discomfort and embarrassment even more than finding the letters. Possibly even resorting to fondling her breasts and kissing her over her gag like she had done when they were younger.