After You’ve Gone - Season 1 Episode 2

Jimmy agrees to letting his children have a party but fears Diana's disapproval so his girlfriend Siobhan suggests he take Diana out for the evening. They go to a sea food restaurant where Diana sees Laurence,a colleague with whom she has been having an affair,with a much younger woman,and counters by claiming that Jimmy is her toy boy. However she is suspicious of Jimmy's behaviour and returns home to find the party,now fancy dress,in full swing.