Wife is wanting to be naughty and explore it

Hi all , well where do I start? I will keep it short and simple if I can. we’ve been together 34 years and our children now grown up and left over the last two years decided we could spice things up a little bit on the norm all our our sex life has always been pretty good watching erotic movies and my wife has also played with me while I’ve watched and I’ve set up an evening once she had a watch erotic sex clip and she masturbate while she’s on the bed watching it. She’s hinted to me she’s got a naughty side and has asked me to explore it but when I’ve asked as she any idea what she’d like to do all she says is she doesn’t really know, but she’ll know when she says it , I’m thinking she might want to do other stuff and maybe getting into a soft swap or just watching other couples , at some stage that might be something that’s on her mind but she didn’t choose a bit embarrassed or afraid to suggest it. I have said to her any idea what you want to try don’t be shy but she is away from the question. She knows what’s on my mind. How do I go about finding what she wants to do? And if I present her with the question, would she like to go to a swingers club just dance the night away but get a bit erotic on the dance floor