Someday, or Maybe Tomorrow?

I know I haven't written in a while. It's because I'm trying to decide if I should end this story happy or sad. You can tell me what you prefer in the comments, but I am already leaning towards an answer, so don't be surprised if you tell me one thing and I do the opposite. So... enjoy the chapter!

Lightning woke up in the hospital. He could hear the pregnancy ward down the hall. He looked around from his bed, but he could see no one.

"Glad you're awake." A voice said.

"Oh, Mr. Dash. It's you. Couldn't stand the screaming?" Lightning asked, still weak.

"Yeah, I hate seeing my little Bria in pain." Mr. Dash replied.

"Bria?"

"Long story. A mistake on our part. Remember to never fight over something as stupid as a name." Mr. Dash replied.

Lightning didn't reply.

"I said promise." Mr. Dash said firmly and calmly, his words burning into Lightning's soul.

"Okay, I promise." Lightning thought for a bit, then said, "What's the real reason you're here?"

"I can't lie to you. It's horrible in there." A tear flowed down his face, surprising Lightning. Seeing such a strong man cry was unsettling. "There's some complications. Rainbow needed an emergency C-Section."

A nurse walked in with some water and a new needle.

"What complications?" Lightning felt something rise in his throat. He felt anxious.

"The doctors diagnosed advanced HELLP syndrome." Mr. Dash said. "They say it's been there for a while and that she thought the symptoms were normal pregnancy symptoms. She's been having seizures for the past hour, and they say her kidneys are failing. They finished her surgery, but she won't stop bleeding..." Mr. Dash shuddered as he recalled sitting next to Dash as she pushed before she was suddenly hit by a seizure.

"I have to go to her now!" Lightning shouted, bolting from the bed, only to be pushed down by a nurse.

"No! Stay here! You are still very weak." The nurse said.

"They aren't letting anyone see her. You have to understand that they are doing all that they can for her." Mr. Dash's face looked like he hadn't taken this news very well.

"How's the baby?" Lightning thumped his hooves around the bed, wanting to get up and move. He tried to clear his thoughts, but all he could think about was how horrible these past months had been for Dash. If she died today...

"She's beautiful." Mr. Dash said. "She's absolutely wonderful. I'll bring her here."

Mr. Dash walked into the hall calling for his wife. She was softly sobbing in a chair, holding a bundle in a blanket. She got up and flew to the door. Grinning through tears, she walked over to the bed and handed the bundle to Lightning, who felt excitement rise in his throat, and a tear flow down his face. He looked down and the first thing he saw was brilliant magenta eyes. Just like Rainbow's. Lightning's breath caught in his throat. He moved the blanket from her face, exposing a light cyan coat and a curl of black and gold mane. Lightning started sobbing. It was his baby after all. He hugged her close.

"What's her name?" Lightning asked the Dash family.

"What do you mean? Rainbow wanted to wait for you before she named her. She wants your approval." Mr. Dash said.

"Does she... does she know that the baby is mine?" Lightning didn't want her to die thinking that she had a baby with someone she hated.

"No. They took the baby away before she could see her so they could work on her and stop the bleeding." This crushed Lightning, and he felt himself crying tears of worry and sadness instead of joy.

The nurses came into the room from time to time to give updates on Rainbow Dash. Rainbow flatlined twice and her blood pressure was way too high at one point. The family spent the next few hours crying and worrying as the doctors worked to get her heart pumping and then to get her blood pressure back to normal. Finally, a nurse checked in and said "She's stable. She's lost so much blood that we need to do a transfusion. You can go and see her now. Just be gentle. Her blood pressure is still a bit too high and we don't want her to have a heart attack."

Lightning let out a sigh of relief. He was upset that he couldn't go in there and hug her and kiss her and hold her until the Celestia's sun came up a billion times.

Lightning was allowed to go in first. He held the baby in his arms and took a deep breath.

"Ready to see Mommy?"

So I decided to play around with "make a pony" games and I made what I imagined Rainbow Dash's baby to be (Just pretend the mare in the picture has wings):
MLP:FiM version: