Your intuition is spot on. I remember weeping when they locked my mother's casket before wheeling her to her hearse. My waterworks surprised me given my feelings about her. Long story short? I thought I had already professed my grief decades prior (long story). While I may have intellectually grieved, I had yet to FEEL my heart's sorrow for the death of the soul who birthed me into this world.

May your fathers' passing be blessed with your fond memories.