How do I find the other girl?

I need a little help, <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> fam. My guy and I are planning to have a threesome as a graduation gift for him. I’m 31 and he’s 33. The graduation is in 2 months and I promised that I would find the girl before then but i’m not sure how to go about finding her. This will be the first time we do this for both of us so we want to do this right and make it amazing! Again, the only thing that’s slowing me up is finding the girl. Any suggestions?