Eventually Daddy will not be Numero Uno

I visited my daughter today in day care while she was having a bottle. Nearby a small boy sat playing with a plastic toy drum. I watched her ignore me and focus on him. He’d make small funny sounds and look at her. I sat watching the sides of her mouth curl up and smile at him, and I continued to try to get her attention. It never worked. I finally sat her down on the ground where she immediately crawled to him where he proceeded to give her the toy. The two of them sat and played for several long minutes while I watched, finally knowing (way too early) what every father of a daughter knows. Eventually she will leave me, and another man will take my place in her life.