Twilight Velvet x Cloudy Quartz
Velvet and Cloudy met in Canterlot in a library. They bumped into each other and began talking, Cloudy quickly gained a crush on the unicorn mare. Velvet and Cloudy grew to be very close friends and Velvet really helped Cloudy get out of her shell.
Soon Velvet confessed she had feelings for Cloudy and their new life began. Cloudy’s parents didn’t approve of their relationship and tried to cut them apart leading to the two mares running off to start a life and marry together.
Soon after their marriage they discussed having a family together and soon found some spells where they could have foals together. Cloudy soon fell pregnant with their first foal, Maudalina. The two were so happy so they decided to have another, and another, and another.
First having their filly Pink Cherry Sour (AKA Pinkie) then Twilight Lilac Sparkle and their last Lustrous Marble.
They raised all four of their fillies happily in Canterlot and remain a happy couple.
Probably not as crazy when she briefly had Chaos magic, but probably still chaotic to some degree. Her unpredictability would increase though.