During an interview to promote her first novel on the ITV daytime chat show Lorraine, Mel Giedroyc revealed that Unforgivable would return for a second series, that filming was scheduled to take place at the end of June/start of July 2021 for broadcast on UKTV's comedy-orientated channel Dave in Autumn 2021. She also invited the chat show's host Lorraine Kelly to appear on Unforgivable.
On Tuesday, 31st May 2022, UKTV announced that they have commissioned Expectation to produce an 8-episode third series of the confessional comedy programme for their comedy-orientated channel Dave. Series 3 will be filmed and broadcast later in the year.