Hey guys. I just thought I'd throw this situation out to everyone. See what people thoughts/suggestions are.
Was in a club last night with my wing. 3 set. (a 5,6 & 7) He's getting on great with one (5) of them and I'm kind of being the "Fun,Sociable guy" with the other 2 who it turns out are sisters (I saw their driving licences, since they don't look too similar
) After a good 2 hours of chatting, dancing and having fun. One of the sisters goes "So who do you fancy me or my sister!" 
I tried to blag it saying I wouldn't answer that as it was a no win situation. That I didn't want to upset either one of my new friends. A little later the other sister asks me the same question. Same answer, but with a add-on of "Why can't I just be friends with 3 cool, fun girls?" And switched thread.
Little later 2nd sister goes to the toilet and doesn't come back, see her later with some other AFC who basically can't belive his luck
Sister 1 tells me Sister 2 is upset with me. By saying LJBF! I remain un-moved. If this is some play at jealousy, I'm not going to bite.We all left together, (AFC guy was nowhere to be found) and I think I left it pretty open with either sister so I could invite them out again with maybe a 30% flake risk.
Anyway, as this was unfolding a few things went through my head. And this is really where I want suggestions for handling this better if it happened again.
i) Does the question qualify as a Shit test or a SOI?
ii) I actually quite like both the sisters. So I'm hedging my bets a bit too much. But I don't want to close either of them in front of the other as its rude. Plus I really want to build up a female social circle.
Over to you guys.