Why we've never seen a unicorn

The unicorn foal

Down on Earth, Lily had finished grooming Princess, and was about to take her out to go for a ride when she heard- "Hey, Lily are you in there?"

It was Crystal. Crystal wasn't allowed to see Princess. She had to hide her. "Quick, Princess get in that empty stall and get down low." Lily said to princess.

"I don't feel well." Princess said.

"Just get in the stall so I can get Crystal out of here, and then I'll check you out." Lily responded.

"Ok" Princess obeyed.

"Yeah, I'm in here. I'll be right out." Lily says to Crystal.

"It's ok, I can just come in." Crystal says from the doorway.

"NO!....Umm.. I mean.. it's ok.. I'm already out the door" Lily says as she hurries outside to meet her friend.

"So, ..umm.. what are you doing here?" Lily asks.

"I was about to ask you the same question." Crystal says suspiciously.

"Well I asked you first." Lily says quickly

"I was just coming by to say hi, and see if you wanted to hang out." Crystal says slowly.

"Well I would love to, but, I'm really busy right now. Lily says

"Busy with what? You're never too busy to hang out with your friends." Crystal objects.

"I'm busy with...stuff." Lily says quickly.

"Bye!" she continues as she runs into the stable closing the door behind her.

"Bye" she hears Crystal say from outside the door as she walks away.

"Phew, she's gone" Lily murmurs.

"Princess you can come out now." Lily says.

"I don't think I can" Princess responds. Lily hurries to the stall where she finds Princess laying on the ground with a strange look on her face.

"I think I'm going to be a mommy soon." Princess says.

"You're going to have a baby! Don't you need to mate to have a baby?" Lily responds.

"I'm a magical creature, and the only one of my species, who am I supposed to mate with?" Princess declares.

"Good point" Lily says.

"So do you need my help giving birth to the baby?" Lily asks

"I would appreciate it." Princess says.

After the baby is born, Lily washes it, and then starts to teach it how to walk. She has a shimmery white coat just like her mother's, and a horn just like her mother's, but, her hair is different, it's shining white with sparkling rainbow streaks intertwined through it. Lily decides to name her Rainbow because of her beautiful hair.