When Sara saw Kara's powers, she would admit she was kinda turned on.

...

After being mind controlled, and she found out that she hadn't been the only one, her first thought was if Kara was okay.

She mentally slapped herself, but she couldn't focus.

Thank goodness Kara was okay.

...

When Kara was gone, she still was in Sara's mind.

And it was driving her crazy.

...

After a few months, she managed to stop thinking about her.

Constantine helped.

...

When Earth-X happened, Sara was happy and worried.

On the one hand, she got to see Kara again.

On the other, Kara was in danger.

When she saw the way Oliver cared for his Kara, she was jealous.

She had killed for smaller things.

...

She didn't know when, but she realized she needed to talk to Kara.

This wasn't just some crush.

...

Soon, she realized if she wanted to see Kara, she would need to make it happen.

So she stole the jump ship and forced Cisco to make a breach.

Thankfully, he was too aware of the knife at his neck to ask questions.

...

"Kara?"

Kara stared at her.

"Is there some emergency?" she asked.

Sara shook her head.

"Then why are you here? To go screw my sister again?"

Ouch, but deserved.

"Uh... no. I was actually here for you."

Kara snorted.

Again, ouch.

"Why? I'm an alien. I'm not even human."

"I... don't know," Sara replied as she stared at her feet.

"Not even human," Kara muttered.

Sara stared at her.

"Sure, you're not human." She didn't know why, but she felt very strongly about this. "But you might as well be. You're not perfect. You fall in love, save people... you're a hero, whether you're a human or not."

Kara looked at her, and Sara could see the sadness in her eyes.

"Why?" she whispered brokenly.

"Because no one is perfect. Not even you."

Sara sat down next to her on the couch.

Kara lay on her shoulder. She broke into tears.

Sara didn't stop her.

She understood how Kara felt.

And she would be there for her.

No matter her feelings.