Cheating at Chastity 3. Cheating at Chastity, #3

Lauren's life is going great. Fantastic even. She has a boyfriend. She has a husband. She keeps both in chastity because she's a modern woman. There's only one small problem. When she surprises Nate at his house, promising to unlock him for an evening of depraved sex, he instead presents her with his friend with benefits, the woman who introduced him to chastity. This is an erotic story that contains explicit sex and sexual descriptions. All characters are adults and consenting.
Intended for adult audiences only.  EXCERPT:  I was confident about my plan. Everything went perfectly until Nate opened the door after I rang the bell. He initially looked excited, but then his face fell and he went into panic mode. "Lauren? What the hell are you doing here?" "I left Alex in his chastity cage. I came over to get laid." I dangled his key from my finger. "Umm.now is not the best time." I noticed he didn't immediately invite me in so he could get laid.
Something was up. I was picking up on the subtle clues. "Why not?" I should have left, but I was horny. "I'm having a guest over, " he said. His eyes glanced up and down the street, looking for a car. He wasn't engaged with me.