Ever since Rainbow Dash's birthaversary, Pinkie Pie and Cheese Sandwich had a huge crush on each other. They were all each other could think about. To Pinkie, Cheese was the only pony who could understand her as a fellow super duper party pony. To Cheese, Pinkie was the first lasting friend he'd ever had. They spent the next couple years writing letters to each other (but never sending them) until one day when Cheese's cheesy sense led him back to Ponyville for Pinkie's birthday.
After throwing a spectacular party for her, Cheese confessed his love to Pinkie, and she likewise confessed her own love. Cheese decided to take a hiatus from being a traveling party pony to spend time with Pinkie and get to know her more. Of course, their mutual crush quickly blossomed into a deep romance.
After Cheese proposed to Pinkie, they had a wedding that quickly devolved into a massive food fight. After a surprisingly relaxing honeymoon, Cheese and Pinkie became a traveling party pony duo. Their parties became bigger and even more fun with two party ponies instead of one.
After a few years of this, Pinkie and Cheese decided they were ready for their party pony duo to become a trio. They took a break from traveling and settled down in Ponyville and got straight to work on that.
Pinkie soon became pregnant with their first child. After 11 months, their firstborn daughter was born. Cheese was shocked to discover that she was a pegasus, but Pinkie's first reaction was, "Funny, my Granny Surprise was a pegasus!" Their daughter was named Confetti Surprise, after Pinkie's great-grandmother, and the three lived a cheerful life in Ponyville. Occasionally, Cheese and Pinkie took their daughter on partying excursions to experience the party pony life.
One day, after an especially fun party, Pinkie discovered she was pregnant with twins. Her pregnancy was rather odd, as she constantly craved cream cheese and had huge mood swings. Finally, the twins were born. One of them was the splitting image of his father, so he was named Chocolate Cheesecake. The other, a girl, looked quite a bit like her Auntie Marble. Maud noted that her coloring resembled a type of marble known as cream jade, so that became her name.
The family continued to live happily in Ponyville until Confetti was a teenager and Pinkie and Cheese decided to resume their party pony career. Since their parents are usually away, Confetti is left in charge of her siblings. She doesn't mind, since she loves them so much. Besides, Pinkie and Cheese always make sure to spend birthdays, Hearth's Warming, and other major holidays at home with their family. Overall, Pinkie and her family live a happy life filled with fun and parties.