You can't and yuo shouldn't.
But if you are a cheater, by nature, then you don't need our advice. The question is does she want it with you? If yes, are you ready to lose your gf? If yes, Go on!
Otherwise, have 3some! Its fun!
2007-02-08 02:11:41
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answer #1
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answered by Ebby 6
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Yeah man, I tried this once myself. The sister flirted with me all the time, hug up on me when my girlfriend wasn't around, all sorts or Sh** and then once I made my move the sister sat the whole family down and told them that I was trying to sleep with her. Of course my girlfriend was pissed as hell, but she was going to stay with me anyway. I broke it off because the family had built up too much hatred toward me. If the sister is a little SLUT then it will work, but it will be very hard to balance your attention between the two.
Like everyone else has said, be prepared to lose your girlfriend, but it can be done. I just completed the Mother/Daughter combo last week and things are still good!
2007-02-08 10:13:30
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answer #2
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answered by voodoo_lover_23 2
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instead of cheating why don't u just dump ur girl then mess with her sis. B/c its wrong to cheat. u wouldn't like it if she did it u now would u? But I warn u that messing with her sis will cause problems rather ur with ur girl or not. They both are going to hate u.
2007-02-08 10:15:54
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answer #3
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answered by biggest_duke_fan_ever@yahoo.com 2
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I can tell you how to cheat on her with her sister but I can tell you how to lose your girl over stupid mistakes.
2007-02-08 10:10:43
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answer #4
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answered by angel h 4
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Unless they hate each other I don't see it being possible. As soon as you approach the sister she is going to tell your girl and you'll be alone.
2007-02-08 10:09:46
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answer #5
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answered by Just D 3
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stupid question - cheat on your girl but be prepared to lose her
and what makes you think the sister wants you anyway?
2007-02-08 10:09:30
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answer #6
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answered by ♥Sabre♥ 6
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It's guys like you who make women like me so bitter. I hope your girl cheats on you first with your brother.
2007-02-08 10:19:29
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answer #7
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answered by Mel 6
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once again just use roofies on both of them. When they wake up their buttholes will hurt and they wont know why. But you do and thats all that is important
2007-02-08 10:11:55
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answer #8
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answered by peeps 2
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Well if ur gf's sister has any sense at all she will not do it. And if you had any sense at all you would not have asked this question.
2007-02-08 10:22:45
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answer #9
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answered by Anonymous
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its not possible sisters always slip she'll find out and you'll just be left with guilt if not your really cold
2007-02-08 10:37:47
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answer #10
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answered by kyrie 1
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