NO SE 3

 Unfortunately for Spike, they never found a cure that allowed him to grow back to his original size, but as time went on, Spike proposed to Starlight and asked for her hoof in marriage, and lost interest in wanting to grow back. Sunburst was the best man of the wedding, while Trixie was the maid of honor. But right after the wedding was over, Spike gave Sunburst permission to kiss Starlight 1 last time during their honeymoon, while being inside her mouth while they were french kissing each other, with Spike being pushed back and forth by their tongues, while swimming in their saliva. And then, after Starlight was finished kissing Sunburst, she spat Spike on his dick and told Sunburst she was preventing Sunburst's cum to enter her cervix every single time he shoved Spike inside her pussy with a spell that prevented him from impregnating her, but now she and Spike have decided it was time for them to have foals, and due to Spike's unfortunate size, he was not able to impregnate Starlight by himself, and the only way it was possible for Spike to impregnate Starlight without being rejected by her fallopian tubes, was to get deeper inside her uterus along with Sunburst's cum.