Kayce Dutton is getting his own Yellowstone spinoff, but all anyone can talk about is about how his wife, Monica, is seemingly missing from Y: Marshals. Yellowstone, which premiered in 2018, introduced viewers to the fictional Dutton family, who own the largest ranch in Montana. When the show debuted, Kayce (Luke Grimes) and Monica's (Kelsey Asbille) marriage played a big role, and their relationship continued to be explored until the show ended in 2024. The fictional couple ended their time on the show still together and raising their son, Tate (Brecken Merrill).