Emma and Mark live with their son and are on the brink of ending their seven-year relationship when Mark proposes to her.

The friend group is tested by Mark and Emma's return while Amanda and Michael both end up using the same middle-aged dating service.

Louise's dying mother Donna moves back home along with a swarm of well-wishing church-goers, putting a strain on Louise and Rich's relationship.

Mark's suspicions push him away from Emma and their friends, even as Sinead must reckon with unrequited love.

Emma and Louise make a pact to find new jobs. Amanda is getting broody and demands to babysit Sam.

At Rich and Louise's impromptu engagement party, lines will be crossed and secrets revealed as Rich, Emma, Michael and Liz all face the music.