An elderly couple's date

An elderly couple talk about their youth, memories of the distant past,very excite , so they decide to do as young as they do.Decided a days to the river to dating.
That day, father pluck flowers, came to the river to wait, wait long and has not see the old lady, the night was coming, and he have to return home, to the house he saw his wife lying in bed covered with sheepskin coat.
Father cry: "how dare you  fail to keep an appointment? "
Old woman bury her face in the pillow,shy and say: "My mother not let me go. "