There were all those signs, like how you dressed, your makeup, and your new attitude. The frequent jogs that took longer than usual and made you come back soaked and weary.
I just secretly followed you to his house and watched you through the window fucking him.
I can't blame you. He looks hot, all tall and masculine, so much more than me.
But the first sign of your infidelity was your half-dried cum I smelled on his cock and your lipstick on his balls. And his smile from above when he saw that I realized we secretly shared him.