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Mad Science

Talking with my Siblings

added by SwapSmith5 A year ago TG Body swap

One day after my monthly check up, I was talking with John and Mariah in her room. Our parents had already departed to work, and Lucas returned to the dorm of his college to prepare for the new semester.
These past two months we have improved our connection and familiarity by leaps and bounds and these two people have become trusted confidantes for me to talk about my experiences and changes. For example, apart from my therapist only these two knew about my new sexual preferences. I told Mariah because I needed to vent my emotions and ask for advice, and I told John because he started to point out how nice women looked right now, and I had to explain sexual attraction to him, and that led to my new sexuality.

Right now I was recounting yesterday’s new discoveries, and although they seemed curious about the orgasm-synchronicity thing, they were more excited to know how the biological mother of this body looked

“You said that she had big boobs, but how big exactly? bigger than these bad girls?” she said, puffing her chest and making her breast bounce under her shirt.

I looked at her jiggling assets and responded. “It’s not that I had a measuring tape to check her size, but I think that they looked a bit bigger than yours”

“Well” she said with a grin. “That will be bigger than a F-cup then, you better start training those back and shoulder muscles more if you want to avoid the back pain.” and from behind she started to massage my shoulders.

Seeing my thoughtful expression she added “Don’t worry too much, now at least you have an idea of how big you will be” she playfully squeezed my chest “ and being tall is also a plus for you, right?”

“Yeah, you are right” feeling better, I straightened my back and separated her hands from my bosom. I didn’t wear a bra when I was relaxing at home, and when she touched my nipples it sent a little jolt through my chest.

“Mmm? What 's wrong John?

I reflexively looked at John due to Mariah’s question. He was slouched and making an uncomfortable expression with both hands between his legs.

“I am not sure why, but my balls are hurting lately from time to time; do you think I need to go to the doctor?”

When he took his hands from his his legs, I could see a big bulge in his crotch

Realizing the problem I asked “What was the last time you… umm ejaculated?”

Putting a face full of confusion, he responded “Ejaculate? Why would I do that? I don’t have a girlfriend and I definitely don’t want babies yet”

Danm, two months without cumming would cause any healthy young man blue balls. I sometimes forget because of how mature he usually acts, but there is much knowledge that John lacks, especially in the sexual department that people usually have trouble talking about.

As I was pondering how to explain masturbation to my little big brother, Mariah suddenly said, “Do you want me to help you with that? if so, take your clothes off and sit on the bed”

Surprised, I turned to look at her “really!?, he is your brother”

She looked at me and said with a smile “Well, not really; at least not biologically”

It was an obvious thing to say, but the sentence struck me like thunder. She was right, despite our closeness, neither Mariah, John or me were blood related now.

As I tried to stand up to leave the room and give them more privacy, Mariah hugged me. In our current position I noticed that she wasn’t using a bra either and I was feeling her big boobs pressing on my undeveloped chest.

“You can stay if you want, I could teach you how to do things from the woman’s side”

I could feel her nipples hardening through our clothes and as I breathed I could almost smell the scent of a woman in heat wafting from her.


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