After some hesitation

Your sister holds the glistening dildo out in front of you. You hesitate for a second. Before all this began, you had never given much thought to this side of yours. You had never considered yourself gay, or even bisexual for that matter, but this is something else, hard to define. And here you are, wearing nothing but a skirt and panties, as you open your mouth to receive Emily's gift. You are undeniably excited.

As you start opening your mouth, Emily brings the dildo closer to your mouth, and you tremble, before letting your tongue run all along the shaft, licking up those sweet juices you crave so much. You glance at Emily, and you can see how happy she is that you are doing this for her. With that, you are determined to continue, as you gently try to take the shaft inside of your mouth. You stop after a few inches, feeling your throat resisting the length that is being pushed down it. Emily pulls it out of your mouth.

"You got to relax your throat John, that way you can take it deeper. Like this" Emily demonstrates by taking it in her own mouth, and you are impressed by her skills, as she manages to get the majority of it down her throat. She makes a gurgling sound as she pulls it out again, thick strands of saliva hanging between the shaft and her mouth. You are beside yourself by the view that you are witnessing, your sister deepthroating on a cock in front of you, as you feel your cock strain against the cage. She smiles, and brings the dildo under her covers again, and you can see her hand move under the bedsheets, as she pushes it into her again. After a few thrusts, she pulls it out, as it glistens once again.

"Now try again John" she says. "And remember, relax your throat this time." You try again, determined to impress her, and as you once again feel resistance as the shaft pushes deeper into your throat, you try to relax it. It's harder than you'd think, but you manage to get it an inch or two deeper and hold it there, trying to push deeper. After a while, you start to feel dizzy, and you pull your head back, gasping for air.

You look over at your sister, and you see her radiating with joy as she suddenly embraces you. "I'm so proud of you John, my little cocksucker." she whispers into your ear. She then holds your head in both of her hands, and leans in to kiss you.

You can feel remnants of her juices mixed with her saliva as your tongues meet. This is your first real kiss with a woman. And it's with your little sister. Emily starts gently biting your lower lip, and the light pain mixes with all the other overwhelming sensations you are currently feeling, as she attacks your mouth. You lose yourself in the moment, moaning loudly as your hands instinctively go to her chest, grazing her bare breasts.

"See but don't touch John" Emily groans, as she takes your hands and pins them on the bed. "Bad boy!" She pulls the covers over you both, and then straddles you, and you can feel the wetness between her legs against your skin, as she plants herself on your thigh. She then goes in for another kiss.

You make out with your sister for what feels like an eternity, your tongues wrestling as your two mouths meet with each other. Your cock aches like never before in its cage. Then you feel her mouth moving away from you, as she sits up, still straddling you as you lay there helpless, looking up at her tits, nipples hard enough to cut glass, and her red flustered face, as she pants. It looks like Emily lost her composure a bit, and she realizes it.

"How's your little cock feeling John" she says confidently, trying to regain her hold over you. You can feel her hand as it traces the length of your cage as she gently cups and plays with your swollen balls. "Oh, it's leaking!" she says, giggling, as she takes her finger and cleans up the precum leaking from the tip of your cage, sucking it into her mouth. You close your eyes and moan, feeling overwhelmed.

"Do you wanna cum sweetie?" she asks. You can't believe what she is saying. It's only been two days since she let you cover her tits in your cum last time. Would she really do so again? "Yes mistress" you reply obediently, causing Emily to chuckle. "It's a bit early for that isn't it?" she says, teasingly. You knew that it was to good to be true.
"But you did well today John." she says, as she leans in for one last kiss, biting your lip gently as she detaches from you.

"Keep this up, and you will be rewarded in due time. Now I'm hungry. Whats for dinner?" she asks, smiling.
You look at your sister with pure devotion as you get up and get ready to prepare her meal. You feel like the luckiest person on earth.