You are now part of a throuple.

Riya puts you down as soon as you guys reach Arya's bedroom.

"In here guys!" you hear your sister yell from her bathroom. Riya and you head inside and see Arya holding a bottle of hair removal with a huge grin on her face.

"I usually save this for special occasions. And I think this counts as a special occasion. Da..take off your shirt."

You proceed to remove the only article of clothing that you have and stand there nervously. Arya eyes your body hungrily. You still had quite the lean physique but you had lost a lot of muscle definition because of your sedentary lifestyle. Putting the bottle aside, she pulls you in and gives you a long kiss, making her tongue dance around yours. You are surprised by the kiss. You'd be lying if you hadn't thought about kissing your sister. But actually doing it? You'd probably be too scared to even attempt it. Not the case with Arya though.

You suddenly realize that you had agreed to be in a relationship with Riya. This could screw things up. You quickly break the kiss, but what you see surprises you. Riya has a smile on her face, instead of the scowl that you were expecting.

"Arya had already told me how much she loved you. But it's interesting to actually see it. Hmmm..." she pulls your sister out of the bathroom and they both talk in whispers. You can see Arya get more and more excited with every second. After a moment they both come back in.

"Da...how would you like if we both shared you?" Arya says with poorly hidden excitement.

"Umm..I mean...if it's okay with you guys I'm mor...."

You don't get to complete your sentence as both of them start squealing and screaming in excitement. Arya gives you a crushing hug and kisses you hard. You can feel her breast smoosh up against your chest. You can also feel her growing bulge push up against your own tiny package.

"It's decided then. You belong to the both of us." Riya says "I think we should prep him now."

"Yes. I'm glad you chose to do this with us Da. We could be a great throuple! Now....time for you to become our little girlfriend!" she reaches for the bottle.

"You're okay with this right?" Riya asks you. "I just don't want you to do something that you're not into."

Arya stops fiddling with the bottle and waits for your reply.

"I'm fine Riya. I want this. Two of the most beautiful girls in the world want to be with _me. _I'm in heaven!"

"Yeah, but still. We're gonna....you know....make you into our girl. Do you really want that? Guys can be very touchy when it comes to their masculinity. And I understand that."

"Well, when you put it like that, I would still very much prefer to be a man. Promise me you won't treat me like a girl outside the bedroom."

"Da....you'll always be a man. We can't take that away from you. "

"And we will always respect you for who you are. And that includes not violating the trust that you've put in us." Riya chimes in. Arya nods her head in agreement.

"Okay...that's a relief." you say.

"But! You will always be our little girlfriend in bed. And maybe, if you're a good girl, we'll let you be the man and take charge." Arya says with a naughty smile. "Are you cool with that Da?"

"Yes, yes I am."

********************

Side note for context:

It would be highly irregular for someone younger in age to be disrespectful to someone who's older in Indian society, even if the age gap is not that large. This usually does not apply to people in a sexual relationship but this is a special case. Arya and Riya are both used to seeing Nick as their mentor and senior, which is why they are making efforts not to be disrespectful.