"EDIT: Please don't bring up this stuff about my brother in conversations with me in non incest related subreddits. I'm not exactly open about it, so it's kind of embarrassing and generally uncool. I'm fine talking about it here, in posts to my profile, or PMs. Thank you!
This is the most recent development since I first posted. Spoiler alert, it's long, and it's largely non sexual, for anyone hoping I somehow seduced my brother instantly or something.
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About a week ago, because of the floods in the area, combined with some plumbing issues in an apartment below mine, I had to make an emergency move to a new building. It was incredibly short notice, and very stressful. The weather was terrible, I had about 5 days to get everything packed and moved, and I found out about it in the middle of a work week. Luckily my job was super understanding about it and even with the few hours I did work during the move, I was able to get it all done.
For the big furniture move, my couch, bed, washer/dryer, etc., I was able to get a friend to help a little, and my brother offered to come and help as well. He's doing a year of online courses before he starts school near me in the fall, so he has a flexible schedule right now.
Being the first time I'd seen him since I made my first post, and with all the ideas everyone had given me running through my head, it was hard not to think about the possibilities. I had to make myself stop because I knew there wouldn't be enough time or energy for me to devote to him on top of the move. I did decide to doll myself up to go get him from the airport though. Thinking maybe I could catch his eye or something. I wore some of my most flattering jeans that really make my ass look even tighter, a fancy, lacy lingerie set (mostly for my own mental confidence), and a low cut blouse to show a good bit of cleavage (and at least from my angle, a bit of bra).
What I didn't expect when I went to pick him up, was that my dad was accompanying him as a surprise. Not a great development when I was hoping for some one on one time with my brother, but certainly a welcome additional bit of help for the move. Throughout the few days they were here, there was a lot of (likely one sided) sexual tension in me having very un-sisterly thoughts about my brother, and my dad being kind of the oblivious cock block.
On Thursday and Friday we moved a lot of stuff, mostly my books, my video games and movies, and my art supplies. A lot of heavy lifting up and down stairs, plus I had already been doing a lot of moving by myself on Tuesday and Wednesday. All that was left by Friday night was dismantling my furniture and packing up my kitchen. Originally my dad and my brother were going to stay at a hotel at this point, because all that was left was my bed, my couch was taken apart to move, and we stupidly moved my air mattress to the new place. So my dad offered to stay at the new place to keep my stuff safe, install my shower head, and do a few other checks for things he could fix up at the new place, and he'd sleep on the air mattress. My brother offered to stay with me and help me pack the last of my things. Soooo finally some alone time! Admittedly, even if he had shown up alone as expected, I hadn't formulated a plan of action to try anything, so I was even less prepared now that I had been resigned to my dad being present all week. But I was pretty fatigued from the week anyway, so I put those thoughts on the back burner.
While we were packing and listening to music, I started to overheat, and at this point I was so tired of the move that I didn't care about modesty much. I let him know I was getting hot and needed to get comfortable, which mostly just meant taking off the sports bra I'd been wearing all day as it was getting really uncomfortable, especially as my breasts were pretty full at this point. I went to my bedroom and took the bra off, which felt truly amazing after the busy day, and I checked in the bathroom mirror to make sure nothing was visible through my shirt. I was wearing gray yoga pants, and a pink tank top that has Jigglypuff's face printed on it, with the eyes over the boobs. Typical casual loungewear for me really. I came back out and got back to working on the boxes.
We were talking a bit, and I asked him if he'd noticed that my new apartment was bigger. I moved to a unit with an additional bedroom, and I let him know it was there for him if he decided he wanted to live with me while he goes to college. He seemed really excited by the idea, and said he'd love to, if I was sure I'd be okay having him around. I expressed, as sincerely as I could muster, that I would love to have him here, and we got quiet again.
In the silence I started to become aware of two things, first: that I was becoming increasingly aware of the movement of my breasts in my top, and it was making me a little excited. Second: that out of my peripheral vision, I could swear he was stealing glances at me. At one point I definitely caught him looking at my chest and it got me INCREDIBLY excited. Enough that I felt my body flushing and started to feel overheated again. In a rather bold move, I decided to tease him by taking the bottom of my shirt and pulling it up so I could wipe my face a little. I could feel the undersides of my breasts exposed to the open air, and I'm not sure how much was visible if he'd looked, but knowing what I was doing gave me a huge thrill.
Enough of a thrill that I started to get self conscious. I knew my breasts were full and in my head I had this fantasy scenario of what would happen if I leaked in front of him and had to explain my lactation, how it could lead to fooling around and maybe sex, but in that moment I was way too nervous to go through with it. But I could feel my tits threatening to start dripping, and I could feel my panties rapidly soaking, so I finished packing up the box we were working on, and told him I would tape it up if he wanted to go ahead and shower.
He left and I taped up the box and bolted to my room because I was so worked up at this point that I needed to do something about it, which I wrote about in more detail at the end of this post. When I was done I took a quick shower and changed into pajamas, a looser white tank top and red booty shorts. By the time I came out into the living room, he was sitting on the floor watching Netflix. I sat next to him, with my legs straight out and crossed over each other, and leaned back with my arms holding me up. I kept seeing him looking at me, and I tried my best to subtly look at him, I just needed to see if he was getting hard or not, and I swear I could see it, a thick length along his right pant leg, about two thirds of the way to his knee. I swear I saw it throb a few times, which made my pussy practically gush with need. I forced conversation to keep my thoughts relatively clean. We talked more about him moving in with me, which he said he wants to do, and we called it a night. He slept on my couch cushions in a makeshift bed, and I slept in my room at his insistence.
We didn't end up getting more alone time, but we talked to our dad a bit more about the plan for him to move in with me, and it looks like it's going to happen! He's going to move in around spring break, and stay with me at least until school starts to see how we manage. So... while not a lot happened, this could potentially open the door for things once he's living with me!"