An Old Date

Got this as a forward from one of my friends'. One of those jokes which left me in laughter the moment i read the entire one.....

A Grandpa and a Grandma always got very excited when they recalled the old days they were together. They made a decision, one day, to make it "yesterday once more". They made a date on the river bank they used to go when they were young. The next day, grandpa got up 6 a.m. in the morning, dashed to the bank, picked up a big bunch of wild flowers before sunrise, waited there for his sweetheart to come. But Grandpa ended up in disappointment as Grandma never showed up even after sunset. Grandpa went home in such anger. He opened the door, seeing Grandma lying on the sofa with her pillow. He threw the flowers on the floor and questioned:" Why didn't you come to our date?!!"....Grandma hid her head in the pillow and replied shyly:" Mom didn't allow me to go!!!"