Advice to slowly grow the seed?
We're a couple in our late 30s. My girlfriend has been open to holding me in chastity on and off for a while and even though she's quite vanilla, she tries her best to grow some dominance and focus more on her own pleasures. My ultimate fantasy would be to involve another man in our sex life (I'm leaning a bit into bisexual tendencies and would love to please him, so involving a third could go the full spectrum from a regular threesome to chastity cuck play for me). She once mentioned she's been fantasising about double penetration but ultimately feels like having to take care of two men would overwhelm her. So she's open to the idea, but currently doesn't see it becoming reality.
Obviously I'm looking for advice on how to ease her into the idea, we've already talked about the idea of just attending a swingers club party without the goal to find someone just to warm up. Apparently she wanted to do that when she was a student and now feels like she lost a bit of interest in that. All in all it seems like the seed to become a hotwife is there but life has been too overwhelming to really explore it.