YESTERDAY i was chatting on MSN to this HB. One of the sexiest girls i've ever met, and totally conscious about it! She's one of those girls who really enjoys seducing, that will give you that naughty look that will be enough to get you excited! Displaying very sexual, very FELINE behaviour over you, while at the same time giving you signs that she is the boss.

As i was saying, yesterday we were chatting on msn and i made up this game in which i would ask her questions in order to determine whether she was naguhty or not : in the middle of it, she started telling me (with really hot (unnecessary) details) how much she LOVED anal sex, and how she was a complete nymphomaniac and telling me about her WILD experiences . (she is the younger sister of a friend of mine and we had already kind of teased each other, but not in such an explicit manner) At that point i kind of lost myself... The OLD ME wouldn't try to hide his excitement and would go: "i'll go pick you up right now and you're going to SHOW ME all of that!" however i'm learning to stay cool and kind of behave like if it was no big deal... i just told her at the (in the context of the game- that some of the answers would need to be proved)
Is that what you think i should have done? how would you have handled this situation? given this girls personality ( who is much more about SEDUCING than being SEDUCED)
Should i neg her like: "hey i could have some fun with a girl like you. too bad you're my friend's sister." ? Or should i just play her game?
What do you think that was her real intention by telling me all that?

I really have a tough time handling girls who like to seduce, because i can only hold myself until some point in which i''ll explode and try to get DOMINANT... any advices are welcome

you said that she is trying to display that she is the "boss". Umm....I think here in this PUA forum WE are about being the boss. That's what this whole thing is about. We are trying to make ourselves into the bosses of the relationships -- our basic rights from birth to be men and dominate. Something that this bullshit society has tried to deprive us of.