Love the site... Love Becca's stories.
My discovery of my sister's masturbation activities all started last year when she was 14. I was home from school when one day I walked into my sister's room to say hi and accidentally caught her naked, humping a pillow. I laughed and apologized, and assured her that everyone does it. I was turning to leave her room, when she told me to stay and show her how guys jack off. My sister and I are very close, very open with each other. So I figured that as long as we didn't touch each other, masturbating in front of each other should be fine.
I followed suit and took off my clothes to expose my hard on. She was staring at my dick as she started up riding the pillow again. I started stroking nice and slow to enjoy it, staring at Elizabeth's boobs, and pubic hair (a thin brown patch) the whole time. I really wanted to see her clit pop out, so I asked to see her clit, and she switched positions. She now lied down on her back with her legs spread wide. Liz's lips were glistening with her wetness, as she circled her clit to orgasm. After moaning so soft, and cute, she demanded for me to cum. Following directions, I shot my load onto her shower towel on the floor.
Now we masturbate in front of each other every time I get home from college. I think it is fine for siblings to masturbate in front of / with each other as long as that is all that they do. Happy Masturbating.