Yes, similar situation. My wife's best friend was a constant flirt with me, verbally and body wise, sometimes being topless and even nude when around my wife and me. She was younger and slimmer and constantly sexually teased me - for years. One day while we were visiting her home, she was wearing a short silk kimono and nothing else, her boobs often poking out and her pussy/bush showing when she sat down. She was driving me crazy, looking right at me while spreading her legs to flash her pussy at me across the room. We had been traveling the day before and stayed up very late talking to our friend and drinking some too. My wife fell asleep on the couch and her friend took me by the hand and led me to her bedroom, took off her robe and told me to eat and fuck her. I did. She had 5 orgasms in a row and I filled her 3 times, all in about an hour or two. She said and I said, we could never tell anyone about this. While fucking her, we both simultaneously said, "I have always wanted to do this." Never told. After that, relationship of friends continued for years until her early death due to cancer. I must say, that after that one time, the friend was less of a sexual flirt, but still did so everytime we saw her. My wife tolerated it as just her friend's normal behavior around me.