With Twilight Sparkle and Shining Armor grown up and living away, Twilight Velvet misses having a baby in her house. Meeting her grandfilly, Flurry Heart, made her miss motherhood even more. Upon her return from the Crystal Empire, she decides it's time for her and Night Light to make a baby, and she's going to use the fertility spell she learned from Cadance.

Contains: Orgasm denial, light cum inflation, lightly swollen balls, and impregnation.

Thanks to Sleepy Panda for the edit. The fertility spell idea was given to me by Megapone.