The joke if the day

Bayo and his wife Ola received a letter from their daughter who went to study modern physics overseas. SHE WROTE~My beloved Parents, I miss u so much & it breaks my heart to think that by d time i get back, you will be too old. So, enclosed you will find a bottle of a red portion i have invented. It will make u young, so when i return, you will be the same age as i left u. NOTE: "Pls, take only a drop."GoodBye i love u! So they opened the envelope & in it, is a bottle with a red portion. The man looked at his wife & says U go first". So Ola takes a drop, thereafter Bayo follows. Indeed d wife turns 5yrs younger. Years later, the daughter returned home to find her mother young & pretty, carrying a baby on her back. The mother proceeds to tell her daughter how d portion worked & made her look young. D daughter was happy & asks after her father . "Your Father? Hmmmmm,, ur father was so jealous dat i was so young and beautiful, so he drank the whole bottle. Whaaaat? So where is he?" replied her daughter. Hmmmm, na him dey my back...