Am I nearly there?

Well, 3 years ago I mentioned to my wife I would like to see her have sex with others, she was very upset and I thought for a few months we were over. Over time however, lots of talking and some gentle role play that has become more extreme and realistic in the last year has kept us going and our sex life has never been better. Recently I mentioned to her that I had a dream and for my 50th Birthday we went out as if to go to a restaurant, but when we arrived in the town, we went to a swingers club. She sat me at the bar and stripped to a sexy dress and flirted while I watched from the bar. This never actually came true, but my wife asked what she was wearing, and also what club as she wasn't aware of such clubs in our town. I sent her a what's app with the link to the club and and example photo of something similar to what she was wearing.

So during sex the other night while I was using a large dildo on her I asked if she fancies going one night, she replied maybe, and emphasise that it doesn't mean NO..

So the question is am I close? How do I proceed further, when I try to arrange things she seems to back off (in the past) . Why did she make a point to emphasise the Maybe doesn't mean No?