This is part 2, I think there may be one more part to the story, if you're a good girl for me and get on your knees and beg me for it. Here:
I closed the door of the yoga studio behind us, the only people left were you, your sister, me. I turned down the lights. You were nervous but your sister had a sexy, knowing smile on her face.
My voice became less yoga teacher, more dominant: "Kneel down" I commanded, "lift your arms".
You were shocked at being commanded what to do, but before you could think, you kneeled on your yoga mat and lifted your arms.
"Show her to me" I told your sister.
She stepped in front of you, her soft, sweaty belly and the folds of her pussy in her tight, dark green yoga shorts right in front of your face. You could smell her musk, like cloves and pepper and body odor. She lightly ran her fingertips from the palms of your lifted hands, down the insides of your arms, down the sides of your breasts, and as she bent over to do this she gave you a kiss, gentle at first, but then you felt her tongue on your lips as her hands caressed your small tits. The adrenaline was rushing through your body, you couldn't believe your own sister was kissing you! But you opened your lips and let her tongue meet yours, wet, soft, flicking back and forth. Her fingertips slid under your sports bra and lifted it just enough so that it rested above your exposed breasts, your hard dark nipples standing out. She pinched them and your whole body shivered. She kissed you again and stood up.
"More" I directed, "Show me your sister's pussy!"
She blushed, looked away as if ashamed, then reached down and slid your dank yoga shorts down your thighs to just above your knees. You had never seen your sister, so strong and assertive, take orders like that. Your head was swirling with emotions. You were exposed to me now, still kneeling with your arms in the air, your tits out, your shorts down around your knees.
"Touch her cunt" I said, "Touch your sister's pussy!"
Your older sister kneeled down and reached her hand to touch your bald, sweaty pussy. It tingled, it felt good, you could feel her rubbing your clear lube all around. She lifted her fingers, but to your mouth, and slid them in. You tasted your musky, clove-like fluids, your sweat, on your sister's fingers as you looked her ashamedly in the eyes. She pulled her fingers out of your greedy mouth, a line of spit hanging in the air; she rubbed your pussy again, this time focusing on your sensitive clit. Now she slid her fingers into her own shorts and laid back on the floor and starting masturbating with her eyes closed, saying your name over and over as her hand moved faster and faster. The yoga had put her into a trance, she had been thinking of this moment since you were little teen girls giggling and trying on each others panties late at night, sleeping together innocently in the same bed.