As the Lennon marriage disintegrated, culminating in divorce, McCartney was very sympathetic to Cynthia.
So what if McCartney began a relationship with Cynthia Lennon, whether after the divorce or as the marriage was disintegrating?
Cynthia returned to Kenwood with Julian, and Lennon and Ono first set up home together in Ringo Starr's flat in London. They had a brief meeting again, where Lennon accused her of an affair in India, saying she was far from an "innocent little flower".
She refused to claim half of his fortune, choosing to avoid a lengthy court process. Lennon initially refused to give Cynthia more than £75,000, saying "That's like winning the pools, so what are you moaning about? You're not worth any more." She later accepted £100,000, plus £2,400 in maintenance, custody of Julian and ownership of Kenwood. The divorce was finalised on 8 November 1968.
Earlier that year Paul McCartney had visited Cynthia and Julian at Kenwood, despite Lennon's objections. On the way there he began composing Hey Jude, addressing it to Julian. He gave Cynthia a red rose, and joked: "How about it, Cyn? How about you and me getting married now?" She was touched by his gesture, and never forgot it.
So what if McCartney began a relationship with Cynthia Lennon, whether after the divorce or as the marriage was disintegrating?