"That's what this is about." Red (for it will be convenient to refer to her as such) realized. "This is about Lena."
Lex remained silent for a moment before he regarded the Kryptonian clone "I thought you were stronger... but... people disappoint."
"Yes. They do." Red agreed before her eyes began glowing a brilliant shade of blue and the ship went up in flames. Only one being survived the explosion and Red, ignorant of the evil she'd just extinguished, was left to decide her fate. Going back to Kaznia, except to collect her books, was an unappealing prospect at best. Going to America had its prospects, though as a conqueror or a citizen she wasn't sure, but the obstacle of Kara Danvers was one that had to be dealt with and Red couldn't say that she'd win a straight up fight. She could just leave the planet outright. Find a new home somewhere else in the galaxy.
It was as she flew over the Indian Ocean that the idea came to her. Flying off to one of Lex's hidden bases, she quickly found the information that she was looking for. A way to slide into a peaceful life and get rid of Kara Danvers.
It was a slow day in STAR Labs of Earth-1 when a breach opened up and Red Daughter sailed out. "Barry." She nodded "I need you to contact the Atom. I need some shrinking tech."
"Ok but you know I'm Cisco right?" The unamused meta asked.
"Sure." The Kryptonian lied, cursing Lex's incomplete research. Still after forty hellish minutes (what sort of idiots could be late with a time machine?) having to take in STAR Labs' frankly bizarre smells, she had the technology that she needed.
"Need any help?" Barry asked.
"No." Red said bluntly.
"You sure? I don't mind." Barry smiled.
"Yeah we can come as well." Sara said.
"You're not gonna take no for an answer are you?" Red asked to which they shook their heads. "Well Kara is very lucky to have you as friends." She said as her heat vision began to charge.
---Next Morning, Earth-38---
Kara let loose a yawn as she prepared to take on the day. As she woke up, she rolled over onto her front and got on all fours. "Wait. That's not right."
"Oh it is now." Kara heard a very familiar voice say.
"Wait whaaaaaaa-" Kara trailed off as she came face to face with a gigantic version of herself. "Who... what... are you?" Supergirl asked as she floated up to the giant's eye level.
"Well I don't really know that," Red confessed "But I'm going to be Kara Danvers."
"Sorry what?" The inch tall girl asked.
"It's simple really. I hated all of Lex's rules and desired an easy American life. But you were in the way."
"LEX?!" Kara asked.
"Yes but I killed him. So I went to Earth-1 and got the tech to shrink you of the way."
"And what's to stop me from getting the tech to grow me back?" Kara challenged, eyeing the breaching device on the table.
"Well I killed Earth-1 as well." She said it so casually that Kara had to do a double take. Unfortunately, this allowed Red to seize her miniature progenitor.
"What are you doing?" Kara asked, her shrunken down strength useless against Red's fully sized counterpart.
"I need to know who to act like Kara Danvers. So you are going to tell me." With that Red pulled down her shirt. Kara gulped as she took in her doppelgänger's gigantic bosom before she found herself stuffed into it.
"Let me out of here!" Kara protested as she pounded and struggled against the soft flesh. Much to her surprise, the breasts were instantly pulled apart allowing her safe passage. "Oh." But before Kara could do anything, the breasts slammed back into her.
"What the hell?"
"You misbehave. I slam my breasts into you." Red said casually as she got ready for a day at CatCo. "Want me to do it again?"
"Yes." Kara said bluntly. Shrugging, Red repeated the act. "Again." Kara said, to Red's confusion. After a few more times, the clone got wise. "You... you're getting some sick sexual thrill of this aren't you?" The ex-Kaznian asked looking down into her bosom.
"I may be Supergirl but I'm still a girl. I have needs."
"Well then I just won't do it." The clone smiled causing Kara's face to drop.
"Maybe we can-"
"Whoops gotta run." Red smiled, snapping her shirt shut as she flew off.
1) Red doesn't quite manage to stick the landing at CatCo, sending Kara tumbling into the front of her clone's panties, introducing Red to a new, and rather exciting, feeling.
2) As Red flies, an emergency calls her off-course. In solving the crisis, she gets turned upside down, allowing Kara to slide out. With her usual hang outs known to Red, Kara tries to sneak back to Midvale to hide.