Isn't it obvious?

Robin looked at the hypnotic light irradiating from her cock and flowing into Sharon's eye, silencing all her thoughts and leaving her mind open to any kind suggestion.

"Ok Share-bear, you should have sex more with me because you, like, totally love my cock. You love it so much that you want to be my sex ****." She said giggling, the bimbo wondered why she never used her power to enslave others before, oh well it's never too late to remedy (Robin didn't know that she gave herself this power only a minute ago.)

"Your sex ****..." Repeated Sharon in a monotone voice. Robin interrupted the light and in a few seconds Sharon was out of her trance. Sharon, now awake, looked Robin's cock with desire then she lifted her eyes.

"Mistress please, can we have sex?" She asked.

"Oh yes, it's your birthday after all." Happy as never, Sharon stripped in a few seconds and climbed on the bed, after getting on all fours she started to shake her ass back and forth, ecouraging Robin to fuck her. The Futa Bimbo was more than happy to oblige, she took off her clothes as well and positioned herself behind her new ****.

"Happy Birthday Share-bear." With these words Robin shoved all her 10 inches into Sharon's cunt. The girl felt her walls spread to their limit, she moaned with the plasure filling her mind. Robin grabbed her hips and start thrusting in and out of Sharon's pussy. Robin moaned happily, finally able to have a real fuck, she was still a bit mad with Jim for leaving her without repaying the favour.

"Why didn't i use my power?" She wondered before returning to fuck her ****. They continued for ten minutes surprisingly not attracting the attention of Sharon's mother or sister (for now). Robin groaned, leaning forward and hugging Sharon as her huge tits shifted on her back, her pussy's walls are so soft and yet tight that she's going creazy, the bimbo and her **** are both about to explode. She accelerated her thrusting eager to unleash her load into Sharon's womb.

"Mmmh i'm cumming!" She said, reaching her climax.

"Me to Mistress aaahh!"

"Take it!" Robin exclaimed, painting of white her ****'s womb while she squirmed in pleasure. They stood still for a few seconds than Sharon, exausted, fell on the bed while Robin took out her still hard cock, she enjoyed the view of her cum flowing out of Sharon's cunt. Suddenly the door opened.

"What's going... on..." it was Shannon, Sharon's twin sister and judging from her face she didn't except to find this scene, but Robin, being a bimbo, didn't understand it.

"Hey Shannon, are you here to join us?" She asked, the other girl didn't answer, stunned by the view and Robin's words.

" Like, i didn't know you two were such a couple of..."