Claim: Lorna Cartwright makes various attempts to cut her affairs with Phil, then when Lorna discovers that Phil is planning to emigrate to South Africa, she immediately tells Kathy.
Evidence: When Lorna discovers that Kathy is planning to emigrate to South Africa, she immediately tells Phil, just to cause trouble between them. 
Phil is plagued with guilt, he tries several times to end his affair with Lorna, but he cannot and always ends up having sex with her again.