In the 1970s, John Lennon began a relationship with May Pang, his and Yoko Ono’s assistant. Ono did not view the affair as a betrayal; in fact, she helped orchestrate it. Pang was in love with Lennon, but she felt that Ono still had a measure of control over the relationship. Pang believed that Lennon liked it this way. She said he sought out partners who were able to control him.
Lennon and Ono married in 1969 and began to face marital problems in the early 1970s. Pang worked at Apple Corps and said that Ono approached her about starting a relationship with Lennon.
“Yes, Yoko did approach me, and I thought it was insane,” she told Variety. “I told her I wasn’t interested at all. They were having problems in their marriage; they actually weren’t talking to each other. But John spontaneously decided to go to L.A. on his own and asked me to go with him. Yoko wasn’t even aware we had gone until after we left.”
Pang and Lennon were together for roughly 18 months during his Lost Weekend phase. Ono said this didn’t upset her.
Source: Emma McKee/cheatsheet.com