This movie is a slow burn which ramps up the pace in the second half.
You have it all - the multi million pound business, the perfect home and a gorgeous future Wife. The only thing missing is a StepMother, adopted when you was younger it's a Woman you have always dreamt of one day having the pleasure of meeting. As well as that, you and your fiancé have been trying to conceive for a while now - perhaps that explains her mood swings. She blames the untidiness of your home on her fertility and suggests getting a live in Housemaid, you can afford it so why not?
Minutes after the job advertisement become live, an almost perfect CV arrives in your inbox. She seems like an elderly lady with 20 years of cleaning and cooking experience... she seems... almost too good to be true. When she arrives for her interview with you and your fiancé, you are surprised at how good looking she is. The two of you could almost be steprelated, the same green eyes which you find yourself getting lost in. She is the right age but no, she has been a cleaner for most of her life.
She tries her best to tidy up after your fiancé's mess, you feel bad for the way she has been treating this lovely Woman who is now living in your home. There's just something about her, you can't help but to flirt with her. The two of you keep bumping into one another while your fiancé isn't around, it's almost fate. She has this stepMotherley instinct when she is around you which you find comforting. You confide in her about your mystery surrogate stepMother and that's when she tells you that she used to do that, she found it rewarding helping stepFamilies that couldn't conceive. You are sure it's her. It has to be, this is fate.
But it's too late, you have both already fallen madly in love with each other and it almost doesn't feel taboo seeing as she wasn't the Woman that raised you. She keeps telling you this is the last time; but you find yourself becoming addicted to fucking your StepMommy behind your future Wife's back, addicted to this taboo love affair that is spiraling out of control.