Yes, after a good spanking.

She lifts your ass up and roughly fingers your tight pussy with two fingers, and no build up. You screamed into the bed, as she got harder, "Cum, sis," she said, letting you screamed louder, somehow, as your body tensed and you shook, going into a orgasmic spasm as it ripped thru your body, leaving you exhausted and drained.

"Beautiful." she teased, getting off the bed and you heard the faint sound of a camera "Sarah loves it. Rest, you'll tell Sarah how you feel, tomorrow." she left you to sleep.

"You should've seen her cum. Edging, spanking, and getting bound, even slightly, makes her cum so fucking hard." you heard Elena say. Is she talking to someone?
"I'll get to see it so many times." a very familiar voice said. Sarah? "I think she should get to watch you get rewarded for finally making her a submissive, and not letting her find out."

Find out? Find out what? you thought as you faked being sleep when you heard the two of them entering your room.

"Wake up. You can't trick me." Elena said, flipping you over.

The faint sharp of pain from the spanking stung a little "Get....Sarah out of here!" you said, trying to block her view, but Elena got behind you and held you still "No! I-"

"Oh, shut up." Elena whispered "Tell her what you feel. Or..." she slid a hand down and teased you "You cum in front of her, by my hand." she whispered into your ear.

You stayed quiet, wanting to disappear from this reality, until you blinked and saw Sarah in your face "She won't be the only one with her hands on your pussy." Sarah said. Now you need to make a choice or get fingered by your sister and your crush and friend.