You take it out

You do. Somehow you cant resist her mesmerizing voice and do as she says.

Your dick is out. She giggles.

Sister: “Alright then. You need to get used to the warmth and wetness, while at the same time, training yourself not to cum too fast. So I will use my saliva as lubricant and a soft grip that should simulate a womans vagina. You focus on your tricks to last longer, think about the embarrassment of cuming prematurely, just like we trained. And if that doesnt work..well it wont be difficult to think about me now will it? Hihi”

You dont know what to respond, you just watch her in shock, as she sensually licks her fingers. She looks so sexy doing that, even though she wears so unrevealing clothes.

She moves her wet fingers slowly towards your dick. Is this really happening? Your cock is pulsating, your body is shivering. Finally, her wet fingers touch your dick. Wow! An electric sensation shoots through your body. Precum already collects at the tip. Your sister grins mischievously.

“Imagine, my hand is a girls pussy. Imagine slowly penetrating it, feeling the wetness..” your sister says, while simulating it with her wet fingers and a very soft grip.

Sister: “Don’t forget to think about it. Use our little trick.”

You start to imagine how you would prematurely cum, how embarrassing it would be. Somehow it seems to bring you even closer to the edge.

Your kind sister helps you with the visualization, by describing it in detail: “Imagine you are just about to penetrate her..and you feel the orgasm already coming..you are getting closer…you know you gonna shoot any second, prematurely, before you could satisfy her, you barely penetrated her..imagine the embarrassment..imagine how she will laugh about you…”

She starts to move her hand up and down your dick…is your sister actually jerking you off right now? Is this really happening? And why are you so close to cuming already??

Sister: “Imagine, feeling this wet, warm, soft sensation on your dick and you know your about to cum already, you feel it, you want it, you cant hold it any longer..you explode!”

At that moment, her words, combined with the sensation and with the view of her looking down at you and biting her lips, takes you over the edge. You explode, 2 weeks of cum, all over your sisters sweater and pants. She laughs excitedly as it happens. You are so embarrassed!

You: “H-how did that just happen? I thought I would have more stamina now!”

Your sister, catching her breath after managing to stop her laughter:”Well, seems like its good we are doing this training, the first time a female touches your dick and you spurt after 2 minutes! Imagine if we wouldn’t have started 2 weeks ago, we wouldn’t have any chance to get you ready for your anniversary with your GF”

You: “But…when I was doing it myself…when I was masturbating I could easily go 20 minutes…I..”

Sister: “Well thats different. When a girl touches you it obviously takes much less. And also the wetness of my saliva on my hand…thats a sensation you were not used to. Imagine what my.. what a pussy would do to your dick. Trust me, if we wouldnt have done that, you would have exploded the very second I touched you.”

You: “…Really?”

Sister: “Yes of course. Ok, its time for the next step now. We rewind your dick to get used to the wetness that you will feel inside your a girls pussy. So its super important that you dont touch your dick with your rough dry hand. To make sure you are not tempted, I got something for you, to help you.”

She takes out a chastity belt. What the fuck, does she really want you to wear that? You tell her youre not sure about it, that you will just keep on controlling yourself like before.

Sister: “Oh come on, I bought it just for you…so you dont have to struggle so much anymore, to help you…I’m just trying to help you..”

She looks so cute when shes sad. You didn’t mean to hurt her feelings. And after the moment you just shared with her, you don’t want to say no to anything she wants.