Finally getting around to this.
Inspired by
Miss-Barker MANE SIX AND SPIKE: Twilight Sparkle x Time Turner (divorced): Star Cluster, Ambrosia, Aquamarine
Pinkie Pie x Cheese Sandwich (married): Meringue Pie, Confetti, Mascarpone Pie, Marzipan Pie
Rainbow Dash x Thunderlane (sperm donation): Wind Rush
Rainbow Dash x Lightning Dust (partners): Amari (adopted)
Rarity x Big Mac (married): Opal Polish, Honeycrisp
Fluttershy x Discord (dated): no children
Fluttershy x Braeburn (divorced): Blue Jay, Skydance, Apple Dusk
Applejack x Fancy Pants (one night stand): Apple Pie
Applejack x Soarin (married): no children
Spike x Ember (partners): Coal
CMC AND FOALS: Apple Bloom x Tender Taps (married): Zap Apple, Apple Dance
Sweetie Belle x Button Mash (divorced): Hip-Hop, Vanilla Bean, Creme Brulee
Scootaloo x Rumble (dating): no children
Babs Seed x Twist (married): Alexei (adopted)
Diamond Tiara x
Chip Mint (dating): no children
Pumpkin Cake x TBD: Spice Cake
ROYALS: Celestia x Discord (dating): Jester, Artemis
Luna x Sombra (broke up): Night Void
Cadence x Shining Armor (married): Flurry Heart, Skyla, Babble Brook
Thorax x Flurry Heart (partners)*: Split Shale, Crystal Drop, Naiad
*I headcanon that both Thorax and Flurry Heart, like Celestia and Luna, are immortal and therefore the age gap becomes less and less of a problem as they age.
MANE SIX RELATIVES:
Zephyr Breeze x Saffron Marsala (married): Cinnnamon Sugar, Ancho Chili, Black Pepper
Marble Pie x Minuette (partners): Calla Lily
OTHER: Gustave le Grand x Cherries Jubilee (married): Jam Tart
Trenderhoof x Coco Pommel (divorced): Rayon, Flannel
Spitfire x Soarin (broke up): no children
Ahuizotl x Daring Do (open relationship): Steel Toed Boots [Steel]
Sky Stinger x Vapor Trail (married): Cumulus
Aloe x Tree Hugger (married): Honeybee
Octavia Melody x Vinyl Scratch (married): Bass Boom, High Strung, Concerta
Sassy Saddles x Fashion Plate (one night stand): Punk Rock
Sassy Saddles x Toe Tapper (partners): Copper
Starlight Glimmer x Sunburst (married): Parchment, Sweet Pea, Dream Catcher, Quartz
Trixie x Flash Sentry (divorced): Top Hat
Roseluck x Donut Joe (married): Sugar Flower
Derpy x Time Turner (dating): no children
Lyra x Bon Bon (married): Eye Candy, Tie Dye