The day my son was born should have been the happiest of my life. Instead, it marked the unraveling of my 21-year marriage. Ethan and I had spent years battling infertility.

While he was once supportive, he grew distant—working late, whispering on the phone, and showing little interest when I decided to try one last fertility treatment at age 40.

Against the odds, I got pregnant. Ethan reacted with lukewarm support and refused to be in the delivery room. Two hours after I gave birth, he entered my hospital room and asked coldly, “Are you sure this one’s mine?” He claimed his mother had “proof” of an affair and accused me of faking the birth. Shocked and heartbroken, I called my best friend Lily. Sensing something was off, she followed Ethan and saw him enter another woman’s house. She urged me to hire a private investigator named Lydia.