My friend and I had a chance to sit down (sober) and talk about this tonight. I must just be horrible at reading signals, because she said she's had a crush on me for a while too. As for their relationship, it is definitely open for girl-girl stuff, though she has to talk to her hubby about possibly involving my husband. We agreed that the first time at least should just be us... there'll be enough akwardness with just us fooling around until we both get comfortable. I was rediculously nervous until I told her, but once we started talking the butterflies turned into a wee bit o' courage and all went well. I even got a lingering goodbye kiss before I headed home from the coffeeshop
Yay!
Thanks all for your input and advice.
analog - I did! And it was fun!
onodrim - you're right, she was worried about ruining our friendship if I wasn't really into it, which was why she waited for me to make the first move.
ratbastid - she will be talking to her husband on her own first, but yes we do plan on talking with both at length provided the first time goes well. She says that their relationship is open, and that her husband considers himself poly; their relationship after all started out as a triplet, until the third party started acting very immature and keeping secrets about the whole thing.
CaliLivChick - My husband's not comfortable sharing me with another man at this point, which she knows. He says that a girl can give me something he can't, but that for what he can do he wants to be my one and only (but we'll see how this goes and that may change as well). She said she would need to talk to her hubby before getting involved with another guy, especially with the stipulations my hubby has right now. But just us two together is okay with both. Once she and I are comfortable together, I'm fine with either or both watching. I don't want to jump into bed all four of us at first, but I think I would be okay with things going further. I don't think we'd want to do a true swap.
SecretMethod70 - I agree completely. I needed the alcohol to get up the courage at first, but now that it's out in the open I'd be fine to discuss it with any of the parties involved. My husband comes first, but this girl is an awesome friend and I don't want to damage either relationship or hurt anyone's feelings for a few hours of fun.