Playing the Waiting Game

I am divorced and have known this woman for almost 3 years. I have always been attracted to her. She has been dating the same person for about 4 years and several months ago when we were together for lunch (business), I noticed a ring on her finger. I inquired about it and she said that she was engaged, however no date has been set.

A week ago we and 2 others met for drinks after work. She no longer had the ring on. After several drinks she leans over and kisses me; not a peck either. Things progressed and we spent a good deal of the night making out and having fun. I called her the next day and told her that I had a great time and that I would like to get together again.

She responded that 'technically' she is still engaged and needs to have a talk with her fiance. She also added that she would like to see me again as well. I wrote her an email detailing my feelings and she responded that she needed time to sort things out.

My question is how much time should go by before I inquire as to where I may stand in her life? I realize that I've waited for this opportunity for 3 years so rushing this will lead no where. Any advice you could give me would be greatly appreciated. If I had room I would send you the emails. Signed. . . 'Playing the Waiting Game'.