Bigger little sister

She stood for longer than she thought flexing in the mirror as her brother came down for his workout, stopping cold seeing his sister in an even smaller looking tanktop, flexing in front of the mirror with muscles he never knew she had. The shock of discovering his sisters muscles piled on top of him not wanting to deal with how uncomfortable it would inevitably be if his sister turned around in an even tighter top for her nipples to poke through, he quietly stepped back up the stairs completely unnoticed by his self absorbed sister. As he approached the top of the stairs, he thinks to himself that he could have seen the round bulge of a boob peeking out from the side of his 19 year old sisters torso as her arms were raised in a bicep flex… but her boobs aren’t that big. He decided instead of figuring out the details of his sisters increasingly sexy body, that he would **** the thoughts out of his head and go to his room to play video games. But then “hey Josh!” he heard from behind him, and he let out a disappointed sigh. Being discovered he went back down into the basement.

“Uh hey Liz.” He uncomfortably said realizing with horror that his suspicions about his sister’s rack were accurate, causing him to hesitate with surprise. Not only were her nipples visible, but even bigger, along with her breasts. “God is she on hormone supplements or something?” He thought to himself, fighting his instinct to look at his sister’s tits, he **** his gaze on her face which just showed her exhaustion and didn’t seem to show she noticed him looking.

“Do you want to use the weights now? I can leave if you want.” Liz asked graciously.

“Well yeah, I was going to work out, but you don’t have to leave.” He immediately regretted saying.

“Oh thank you, I’m just trying them out.” She said, sounding much more energetic than a second ago. Josh nodded to her and walked to one of the machines and set down his water and awkwardly got ready to use it. He turned around to see Liz on the bench trying out a 100lb lift.