Thinking to change our hotwife way of living to Open marriage 26M & 29F

Me (26M) and my wife (29F) are recently married about 11 months ago. We have been in this lifestyle about 2 years. She used to go out with guys since our first year. Honestly, she is wayyyy out of my league and I am about below average in looks (fat and kinda bald too). I had a friend in school who looked so beautiful. We were friends for years and we sexted a couple of times. She knew I jacked off to her. After she found her fiancee she kindly said no to all these with me. Now, her fiancee has decided to marry someone else and now my friend is all single again. I really want to do it with her.

How do I ask my wife about this?