My girlfriend's downfall

[WARNING] ****** /THIS NOVEL CONTAINS EXPLICT SEXUAL CONTENT, CURSE LANGUAGE **** * ** ******* * **** AUDIENCE DISCRETION IS ADVISED “I’m in a relationship with a stunningly beautiful and irresistibly alluring girlfriend, whose charm and grace are unmatched. Winning her heart wasn’t easy, but I thought she was the embodiment of virtue and innocence. However, one day, I discovered a side of her I never anticipated—through our apartment window, I saw a connection with her ex that left me in disbelief. I never would have guessed she could have such a hidden side.” [A/N] [this isn't a fast-paced novel, so for all those looking for an early revenge it's not coming now, it's just a casual novel read if you like it]