There have been two TV series shown over here, which on reflection were about MLC: Life Begins with Caroline Quentin and The Choir Project with Neil Pearson & Sarah Lancashire.
In both the series, the men leave their wives and set up home with younger woman. Reality sets in and the men want to come home. However both woman become stronger, do things that they never did before.
In The Choir Project shows different aspects of MLC - him meeting the OW, leaving his wife and children, setting up home with OW, cracks appearing, him becoming very depressed and missing his old life - his children, wife and home. Her becoming stronger, more a lot more confident, becoming friends with the new vicar, he wants to come home but she tells him she's not sure - she wants to explore her friendship with the new vicar and wants to be sure that she wants her husband back.