Twilight remains the main princess of Equestria and still runs it with her friends. Not long after the series finale she fell in love with Sunny Skies. Twilight soon found out she was pregnant and right before their wedding she gave birth to their son Dusky Stars. A few years later she had their daughter Raine and they remain a happy family.
It was a good while before Fluttershy found love. Reuniting and soon falling in love with her old childhood bully, Dumb-Bell. Fluttershy married and started a family much later then the others did, having her child Oxbow Coast.
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"Rarity Belle"
Family: Hondo Flonks & Cookie Crumbles (parents) Sweetie Belle (sister) Chipcutter (brother-in-law) Adagio Lavender Swirl & Berry Bronze Cut (nieces) Apple Fritter Jack (wife) Cherry Custard Tart (daughter)
Sexuality: Omnisexual
All her life Rarity knew she always had a huge crush on her childhood and current best friend Apple Jack, A little after the finale did she confess and the two began dating and soon married, Applejack having their daughter Cherry Custard Tart.
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"Pinkamina Diane Pie"
Family: Igenous Rock Pie & Cloudly Quartz (parents) Maud Pie, Marble Pie, Limestone Pie (sisters) Cheese Sandwich & Tempest Shadow (partners) Acia Berry Pie, Agarita Fizzy Pie, Asiago Sandwich Pie, Baneberry Twist, Lil Brie Cheese Sandwich & Strawberry Swiss Pie (children)
Sexuality: Pansexual
Pinkie is in a loving poly relationship with Cheese Sandwich & Tempest Shadow. She first began dating Cheese and soon after an assault by Svengallop she had her daughter Strawberry Swiss Pie and a little while after the trauma she had Cheese's daughter Lil Brie Cheese Sandwich. A little while after Tempest joined their relationship. Pinkie having Acia Berry Pie & Asiago Sandwich Pie, Tempest having their children Baneberry Twist & Agarita Fizzy Pie as well. Pinkie loves her big family and wouldn't change it for the world.
Sexuality: Lesbian (found out she was lesbian not long after Soarin's death)
Rainbow Dash was enjoying her life as a childless, single, free mare. She was partying and living life to the fullest. Until she had a one night stand with an unknown pegasus stallion and soon found herself pregnant with her son Breezy Glow. Rainbow never did find his father and raised the colt on his own until she began dating Soarin and soon married him. When she found out she was pregnant for a second time this time she was actually overjoyed and she and Soarin looked forward to their little bundle of joy. The day their son Prism Bing was born Rainbow was informed that Soarin had a flying accident on his way over and perished. Heartbroken she raised her sons all on her own, currently looking for another partner.
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"Apple Fritter Jack"
Family: Granny Smith & Grand Pear (grandparents) Pear Butter & Bright Mac (parents) Big Macintosh & Applebloom (siblings) Sour Cortland Apple & Jupiter Star (nephew & niece) Rarity (wife) Cherry Custard Tart (daughter)
Sexuality: Lesbian
When Rarity confessed her feelings AJ was shocked but flattered, agreeing to date the unicorn and falling in love quickly, giving birth to their daughter Cherry Custard Tart soon after (Rarity named her Cherry Custard Tart and AJ wasn't ecstatic about it since it wasn't an apple or pear name but it grew on her over time).
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"Sunset Shimmer"
Family: Stellar Flare & Sunspot (parents) Sunburst (brother) Maud Pie (girlfriend) Fire Flicker (niece) Cozy Glow (adoptive-daughter) Maud Pie (girlfriend)
Sexuality: Bisexual
After running into her counterpart in the human world Sunset knew she couldn't stay there any longer and moved back to Equestria, soon finding out the situation with Cozy Glow, Tirek & Chrysalis. After being offered it and tons of thinking Sunset took over adopting and reforming the filly Cozy Glow. Quickly loving the evil bat pony filly and always pampering and loving on her. Cozy isn't nearly as overjoyed at the situation but Sunset is growing on her, she'll never admit that tho.
Starlight always knew she had feelings for Sunburst and Trixie, but she was incredibly shocked when they offered a poly relationship with her. Dating her two best friends was basically a dream come true and the quickly married. They weren't planning on having any foals until Trixie suddenly became pregnant. Trixie was ecstatic and excited about the news, along with Sunburst while Starlight felt more unsure and nervous about being a parent. But whe Trixie and Sunburst's daughter, Fire Flicker, was born all those emotions melted away and she devoted her life to loving and raising the filly.