Emily Takes Rebekah Up On Her Offer.

Emily slowly lowered the blanket back down on to her mother and backed away, returning to her room.

Rebekah let out a relieved mental sigh. She knew Emily merged with her mother before, but Rebekah had nothing to do with that and the older sister wanted to keep it that way. Being at her own sister's mercy was enough, who knows what would have Emily would have done when she merged with mom... right? Rebekah tried to reassure herself of her decision as her sibling stayed silent.Emily moved their shared body back into the bedroom, closing the door behind them as silently as they opened it. She walked over to the dresser and stood before it, gazing at the mirror on top.

Emily smiled as she glanced at her breasts and then to her own brown eyes, as if attempting to talk to her sister directly. Even though they currently shared the same body.

*Anything, eh?* Emily mentally asked her older sister.

If Rebekah could control her throat she would have gulped.

*Anything. Just don't use the necklace on our Family.* Rebekah tried to confidently state her terms, even though she knew she was in no place to demand anything.

*Except You, Right?* Emily asked.

*Except...me.* Rebekah replied, totally defeated by the her sister and the magic beach trinket.

Rebekah watched as her sister moved their face into a lewd smirk. Her cheeks blushed and she was nearly drooling with anticipation.

"Deal." Rebekah felt her own mouth speak audibly toward her reflection, as if speaking directly toward her. Their new voice sounded like a cute combination of both girl's.

"You're part of me now." Emily spoke again as she moved their hands up to again grope themselves. She forcefully cupped and squeezed both breasts, sending waves of pleasure through their shared body. Rebekah strained not to show any signs of desire, but her sister was learning quickly how to **** her while keeping her captive.

"And I love what you've brought to the table." Emily chuckled to herself as she finished her sentence. The groping went on for several more moments as she thought about what to say next. Rebekah could feel her shared pussy begin to drip with need as she squirmed from her lack of control. She needed release and was unable to give it to herself.

"You will merge with me whenever I want and you'll stay merged for however long I want. No exceptions." She continued as she moved one hand down toward their vaginal mound, stopping just above the clitoris. Gently Emily rubbed their fatty mound, carefully denying her merged sister any real pleasure. Emily now could not only feel her own desires, but Rebekah's **** lust was influencing her. Their bond must be getting stronger with time. She desperately wanted to plunge her fingers inside their sobbing cunt, but she held off. Emily needed to push Rebekah a bit farther.

"If anyone asks, You like being apart of me. I mean, just look at our ass!." Emily turned around and grabbed their butt. Playfully she massaged and spread their firm cheeks, exposing their virgin asshole to the cold night air. Rebekah had to admit, Emily's tight body combined with her curves did look amazing.

"Just think of all the boys we could have wrapped around our fingers! We're gorgeous!" Emily kept rubbing her hands over her new body as both girls inside increasingly ached for release. Her hands responded to both girls needs as they returned to their sopping pussy. Lightly Emily ran her fingers over her wet lips, taking special care not to penetrate herself.

"But don't forget, if you ruin my fun, I'm sure we'd look even better with Mom." Emily warned her reflection . Both sisters could feel their entire body growing hot as their **** cunt dripped. Rebekah felt trapped but her desperation was becoming overbearing.

"I'm sure you'll be good though, I'll even give you control. I can feel how bad you need this."

As Emily finished her sentence, Rebekah felt the use of her body return to her. Finally getting her chance, Rebekah plunged her fingers inside their shared cunt and vigorously began masturbating. Instinctively her fingers moved to where her own G-spot was on her body and she found that not only had Emily managed to keep it, but it was far more sensitive then when she was not merged. Rebekah could hear Emily whimper and gasp as she continued skillfully working at her spot. It didn't take long at all for the sister's to be over taken in bliss as they finally orgasmed in unison.

*Alright let me try!* Emily mentally shouted after several minutes in a sexual daze from the afterglow.

Rebekah felt her hands return to their sensitive cunt as she lost control once again. Her fingers dug inside herself to **** the spot she had just shown her sister. The girls continued playing and experimenting like this for hours into the early morning until they collapsed from exhaustion.