I want to sleep with my best friend

So my best friend of 4 years needed me to help her talk to this guy on facebook for her because her phone and computer is broke. Well while I was on her page I started reading some of her old messages with him and I found some nudes she sent him and they turned me on, I saved all of them to my phone and always look at them. Well now I want to have sex with her, I just don't know how to seduce her. We are both bisexual and have had sex with girls before, but she sees me as hr "sister". I want to have sex with her so bad, I just don't know what to do. I thought about doing drinking games like flip, strip or sip;I've never and truth or dare beer pong. Then I thought about just getting drunk so I can blame the alcohol . Then I thought about just watching a porno with her when I go over her house again, but I don't know if any of these would work. Any ideas on how to get her to have sex with me?

You say she is your best friend yet you only want to have sex with her, you never thought that maybe there is more to it than that? I would think that being emotionally connected you wouldn't want to do that as often sex can ruin friendships faster than anything. You also say she has a boyfriend, you want her to cheat on him? Im just asking these questions to clear a few things up. If it is just a sexual desire and you know it wont effect your friendship I would say try one of two things. One-Talk to her, tell her how attracted and admit that you seen the nudes and got really turned on from them. She may say your like her sister but at the end of the day your not related and she may feel the same way towards you Two- Since she is in a relationship maybe consider a threesome, bring it up to her that your interested in doing things with her, but dont want her to ruin things with her bf. maybe if your attracted to him aswell things could stir and could turn into a great sexual experience. If your just attracted to her and dont care about keeping the friendship firm I would go with what you said, get her drunk and make your move. But if your best friends like you say.....then talk to her

I have to clear a few things up .. 1. The guy I inboxed for her is not her boyfriend he's just someone who talks crap about her but wants to have sex with her. She's single. 2. I do love her and I would be in a relationship with her but we both don't want relationships right now. She admitted to me that she just wants a friend she can sometimes have sex with but still hang out with like normal(that's what I wanna be) 3. She know I seem the nudes and I commented on her body but I didn't want to make things weird by saying they turned me on because she thinks its weird I saw her naked. 4. She is my best friend and I couldn't replace her, that's why I don't want to scare her of by trying too hard. Thanks for the advice just had to clear a few things up :)