I wanted to introduce you guys to Evergreen
so I thought it was a good time to cover my headcanons for all three of the pie "wives"
First, with the happiest story we have Cloudy Quartz, a bright young mare from a haymish family just like the Pies. Just as she explained in the show the choosing stone paired them together and 2 weeks later they were married. Usually the betrothed would spend this time apart. Which they did, but Cloudy had a bit of a rebellious streak and took to writing Igneous letters that his sister would deliver to him in secret. She wanted the chance to get to know him on her own terms and she fell in love with what she learned. He treated her like a lady but he didn't look down on her, he communicated very clearly that she would be his equal in their partnership. The day they were finally wed was the most joyous occasion of her life, they stayed up all night talking to eachother, perfectly on the same page that they would keep the family rock farm at its best just like their ancestors before them and well...not to be uncouth but Limestone came very quickly. The pair are very much in love to this day, trading polysemous titters when nopony can hear and making eachother blush like schoolfoals.
Evergreen is positioned next but I'll move onto Whipped Dew first as she doesn't actually have the saddest story of the three. In haymish culture theres a period of time where teenagers can go out and experience the outside world, giving them some experience so they can choose whether to stay in the outside world or return home. Whipped was an up and coming weather pony, the mare with hooves on the ground to tell the unicorn and earth ponies what the pegasai had planned for that day. She wasn't working yet being a teen herself but she had an old soul and lucrative mentee opportunity that kept her in ponyville, where she met the eldest of the Pie clan Sodalite. The rite of passage lasts about two years and the pair found a lot of fun in eachother, they weren't quite sure whether they wanted things to go on long term. In their haste they never found the proper time to discuss it either as Dew fell pregnant and it was nearing time for Soda to make his final choice.
He didn't want to leave his family and she didn't want the life he had ahead. It wasn't the ideal either would have chosen, the young mare even losing the opportunity as she had to figure out how she was going to care for this baby on her own. Yet, everything worked out for the best, Chiffon thrived in ponyville making friends and even falling in love just like she had. She was a stern mother but loved her daughter more than anything, happily putting her success over her own hard feelings. Whipped Dew was eventually able to get the job of her dreams and frequently travelled back and forth between ponyville and manehattan until her daughter was old enough to be on her own.
Finally, we have Evergreen. She was from a tree farming haymish family and the youngest of her siblings so for her the choosing stone chose the youngest member of the Pie clan. She didn't meet him until the day they were wed and even on the day of he seemed more interested in celebrating with his brothers and his friends, even despite Igneous' subtle nagging and urging. Desperate to find a place in her new family the worrisome mare made fast friends with her new sister-in-law, as her spirits fell more through the day Cloudy was there to be a shoulder to cry on, something that continued between them long after the wedding. Since the rock farm was already promised to Igneous she was given the gift of being able to return home, her husband coming to live where she felt was home.
Despite his parents best efforts White Marble was a very spoiled stallion, happy to take advantage of the fact that his beautiful wife would be the one who was expected to mainly care for their foals. The same foals who could soon enough take over the work on the farm, leaving him to essentially drink cider and give orders. As his family grew and he realized his pipe dream wasn't all it was cut out to be he ended up fleeing in the night. At some point on his journey he found himself welcomed in by ponies who didn't expect him to contribute all that much, nopony was special here, they didn't even have cutie marks. White Marble had been running for so long. The vagabond lifestyle was nice but the prospect of a free home sounded really nice, especially compared to the alternative.