Pinch it, tightly

"Who is your favorite?" you pinched Sarah's clit tightly, making her yelp and scream, as you treated it like a piece of playdough, rubbing it between your thumb and pointer finger. "Who. is. your. favorite. sister?" you repeated.

"You are! Em!" she yelled "I'm sorry for saying Slut is my favorite!"

"Should I be nice to her, Slut?" you looked down at Elena, who was licking Sarah harder.

"You are asking someone who hates getting her-shit..." she gave away another weakness. Her clit being pinched. "Be kind to Mistress, please." she said.

You let go and put Elena into a tribbing position this time, going thru all you did so Sarah could trib Elena. You saw Elena's tits bounce as she rubbed against Sarah's pussy and now more sensitive clit. The two screamed as they had to hold back their orgasms "Let us cum, please!" Elena yelled, her tits shaking more as she had to keep herself from cumming.

You pulled them apart, so they wouldn't cum. You kissed Sarah on the lips this time, and slid the blindfold up "Gonna spank Elena. Wanted you to see, too." She smiled as you said that, pushing Elena on her knees, between Sarah's legs. Sarah moved so she could watch her ass get all nice and red. Sarah kissed you as you spanked her, enjoying the sight of your big sister getting spanked by you, her little sister.

"Thank you, Em. Can I spank her tits?" she asked, as you finished spanking Elena. You hand her the paddle, so she could spank Elena's large and delicious tits, sucking on them. Each slap made them jiggle, making Sarah spank harder. I should get some clamps to make them wear. you thought as you stopped Sarah.