Any moment which led to foundation

I think everyone who is in this lifestyle. There must have been something very miniscule which led to this

For me it was when a guy friend of me becames friends with my wife. They grew comfortable. I saw them sharing ciggerates, sitting closer to each other, touching each other casually. All this instead of being jealous, i got turned on.

They had their separate weed session which i never would be part of because I don't do it. I went to sleep and they be smoking and stuffs . This kept me hard while sleeping and when she returned sex would be fire. I could not help but imagine all the touches, glances, puffs they shared. Man literally every time she came back on bed after her weed session, sex would be goddamn fire

Do you have something to share like this ?