I fantasize about her being with a big black cock. I’d love to see her getting felt up, finger banged, fucked in multiple positions and then have him shoot his load on her tits, and let me scoop it up and feed it to her
Try watching porn together that features threesomes and check her reaction. If she seems turned on, ask her what she liked/didn’t like and if she’d be interested in going forward
I would go to a swingers club and just observe. Afterwards talk about things you liked and didn’t like and set some guidelines. Go back to the same club in a few weeks and let her flit with different men and take things one step at a time. Make sure she tells all the men that she’s new to...