My Parents' Love Story

Today, I will tell you my parent's parents' love story. Nanay and papa met in at the market. Papa was selling food at a stand in the market. Nanay was a student at the local University (these two sentences are a bit disconnected: you can say "Papa was a food vendor while Nanay was a student at a local University then". One day, Nanay was got hungry, so she went to the market to buy some things food (you mentioned that she was hungry). It just so happened that she ended up buying her food from my pPapa.

Papa was very handsome, but nNanay didn't realize that he could not walk because he had contracted polio when he was a just young boy. However, that did not matter to nanay however (this is okay but it's more proper to place it in the beginning of the sentence), and the two of them quickly became best friends. Whenever Nanay went goes to the market, she would always look for his sweet and smiling face.

Papa had deep dimples so nanay would soon started falling in love with him (the tone changed all of sudden, so you got a bit lost). But before that  would happened, before they and actually started dating, nNanay helped pPapa to write a love letters (did she just write one or multiple love letters) for his sweet heart crush. Nanay was the go-between for pPapa and his crush.