It's a gamble
Like all gambling opportunities, don't play unless you are prepared to lose everything that you are risking. My instinct says the sister is ready to try something, but she might change her mind in midstream. Even worse, she might have some sort of old grudge or unconscious competitive urge that makes her want to blow up her sister's life and maybe even end up being your new girlfriend. Best case scenario: you get to fuck the sister and your girlfriend finds out and doesn't care (not impossible and, unfortunately, rare). Next-best case: you get to fuck the sister and your girlfriend never finds out (More likely, but requires a lot of luck and the sister willing to keep a secret forever.) MOST likely case: you get to fuck the sister and your girlfriend finds out, gets furious, dumps you and the sister also blames you and never talks to you again. Worst case: you make a move, the sister tells you that you are an asshole, tells your girlfriend and you end up alone with no new sexual memories.
So, good luck in making up your mind. The only absolute safe course is to enjoy the peeks and uninvited sexy stuff the sister is doing while you do nothing about it but look and burn it into your brain.
Let us know, please, if new good stuff happens!
|