Everything you need to understand or teach Difficulties with Girls by Kingsley Amis.
In Difficulties with Girls, Amis returns to the relationship between Patrick Standish and his wife Jenny Standish, the characters from his novel, Take a Girl Like You (1960). In that novel Patrick worked hard to bed Jenny. He managed to get her drunk and have sex with her while she was passed out.
Jenny became pregnant and Patrick married her. However, she had a miscarriage and future children seem unlikely...