The song did not begin in a sterile Music Row studio. In early 2016, Brett Young traveled to Puerto Vallarta alongside seasoned Nashville songwriters Trent Tomlinson and Tyler Reeve. Tomlinson shared a childhood memory about his mother, who frequently used the phrase "in case you didn't know" as an unpretentious, affectionate reminder of love before hanging up the phone or walking out the front door.
The trio immediately recognized the commercial and emotional power of turning that maternal idiom into a romantic confession. Young was working through the raw feelings of an on-and-off relationship with his now-wife, Taylor Mills. That friction gave the songwriting session an urgency that avoided generic country-pop tropes. They completed the rough draft in under an hour, stripping away layered metaphors in favor of direct, plainspoken vulnerability.
Young recorded a basic acoustic demo that same afternoon. When he played the work tape for Big Machine Label Group executives in Nashville weeks later, the reaction was immediate. Rather than burying the confession beneath aggressive drums or stadium-rock guitars, producer Dann Huff preserved the sparse, acoustic intimacy of that original Mexican hotel room recording.
