Feeling shunned in the pub,Adam is pleased to meet Leon,who wants to get married to Debs in his church. They become drinking buddies and go jogging together. Adam invites Leon and Debs to dinner and discovers that,fifteen years earlier,as students,Leon and Alex had sex on a bus. Adam is concerned that Leon is still flirting with Alex and wonders whether to conduct the ceremony but Debs calls it off when she finds out that Leon is trying to get back with an unimpressed Alex - who only has eyes for her husband.