Man and woman married, lets say 7 years, man comes home from work each night, tired worn out and distracted, woman (excuse my gender stereotyping) has been at home all day with two toddlers, she is also tired and frazzled. Desperate for husband to spend some time with the kids and give her a break. He's just stressed and wants to watch the news. She gets the tea ready, they both wrestle the kids to bed maybe dashing up once or twice to settle the kids. They watch a bit of Tv then dodge off to bed. Man fancies making love, woman is disinterested there is a brief prod and fumble she makes it clear it isn't going to happen. They both roll over and go to sleep. This becomes a bit of a pattern, maybe at weekends things are a bit better, but there is a gradual cooling off. Nothing nasty, just tiredness, busy-ness and the living of normal life.
Woman takes kids to school every morning, one day there is a new dad dropping his kids off, they share a bit of idle chit chat, he appears interested in what she has to say, but it's pretty mindless 8.30am banter. This happens for a few months, she becomes aware that she is quite looking forward to Monday mornings, after a boring, quiet weekend with her husband, so she can chat to new dad, in fact she gets up 30 minutes earlier to make sure she looks ok!
6 months in, one thing leads to another and they are going for a coffee after the kids have been dropped off at school. He really listens, he laughs, they have so much in common, he compliments her, a bond develops. She thinks about him a lot, and when she does the thoughts make her smile.
A month later they sleep together. When did the affair begin?