Wife started dating another woman
Start out with casual topics and show that you are there for her. Do not give it away that you are still sexually interested in her.Casual conversations and meet-ups can slowly be turned into slightly flirty attempts to get back with her.
Something as simple as a casual text message is a good start. Use the vulnerable state she is in to your advantage. She is probably looking for a friend and that is exactly what you have to be for the time being. Breaking up with someone you are still in love with is surely one of the hardest things you might have ever gone through.