AMS
Vegeta smirked while Goku giggled as their enemy slowly died from blood loss. "This sure was a tough fight, Vetega! I thought the Earth was doomed for good this time, hehehe."
The smirk then slowly fell from Vegeta's face as he came to a realization. A scary realization. "Kakarrot I-" He choked on his words. This is such a ludicrous thing to say right now, after protecting Earth yet again, but it needs to be said.
Goku's smile never wavered. His hand reached behind his head as he slouched a bit. "What is it?"
Vegeta gulped, not wanting to be the voice of reason. "Well, you and I are the only full blooded Saiyans and, not that Pan isn't strong, but if she falls into the same habit that Gohan did, she won't be strong enough to protect the Earth. If anything happened to you or I, it would fall into Trunks and Goten's hands. Even they've been slacking. But since we cannot produce full blooded Saiyans, we should aim to try and create more half breeds."
The smile fell from Goku's face as his hand dropped to his side. "I'm sorry but I'm not cheating on Chichi. I know our wives can be a bit much, but they don't deserve-"
"I'M NOT TALKING ABOUT US, DIMWIT!" Vegeta's shoulders shook angrily before he took a deep breath.
"If you don't mean us, then who are you talking about?" Goku's hands went back up behind his head so he could relax himself. He didn't want to assume things anymore and get the full story.
"I hate the thought of it but, arranged marriages. For Trunks and Goten. Trunks marries Pan, and Goten marries my Bulla," Vegeta hung his head at the thought of making his children unhappy.
Goku also looked down since he knows his son's carefree lifestyle is about to abruptly come to a halt. He can see Goten's smile fall now, and it stung his heart. The enemy behind them had died before he could warn anyone of the Saiyans' plan to reproduce.
"What about future generations? How do we keep making more half breed saiyans? Won't it end some day?" asked Goku.
"No. Think of it like this, Kakarrot. Our half breed sons are going to marry a half breed and a quarter breed. So long as there is a quarter Saiyan in their offsprings, if a quarter Saiyan marries another quarter Saiyan, they will have a half saiyan breed. They just need to have at least one son, and one daughter each."
"Won't it turn to incest after this though?"
"Maybe. But barely. Humans marry their own cousins, so I have no doubt that even when a human thinks they marry out of their family, they're not really marrying outside of their family. Just very distant family."
Goku's eyes bugged out of his head. "So me and Chichi are distant cousins?!"
Vegeta facepalmed before slapping Goku across the face. "ARE YOU A HUMAN?! NO!"
Goku rubbed his cheek before an apologetic smile spread across his face. "Oh right. Hehehehe!"
"Let's just go home and break the news, Kakarrot. Soon after, we need to start hardcore training our sons, daughter, and grandaughter. No matter what the women say, we are the head of the household. The Earth needs us to do this. Don't listen to Chichi, no matter how much she yells at you. You're a super saiyan God now for crying out loud! Act like it."
"Sure thing, Vegeta! But who's gonna cook us food?"
"WE'LL BUY IT!"
