The battle between brother and sister started off with a staredown between the two. Suddenly, Jenny pulled her wings back and made the first move; she clawed Marcus in the face. The result of that caused Marcus to fly to a wall. Marcus then got up and started charging at Jenny. He honed his claws and slashed her tail off. However, her tail instantly regrew. Jenny retaliated with a kick to the stomach.
Throughout all of this, Barbara started shedding tears.
"I can't bear to watch this," she cried. "This is just horrible, even more horrible than when I fought my brother."
"Barbara, don't remind me," Vinny replied. "You were the one who fattened up, not me."
"Never mention that again, Vinny!"
"Vinny, Barbara!" Lois shouted. "One sibling rivalry is enough, but two is just as horrible."
"Lois is right, guys," Matt added. "We should focus more on the fight for our freedom."
Stewie still held his guilty look.
Jenny managed to avoid Marcus' slashes, but she tripped and broke one of her front legs. As Marcus crept closer to her, he raised his paw and slashed. However, Jenny felt no pain from that.
Matt had protected his big sister, but at a fatal price. As his top half landed, the Griffins began to mourn his loss.
However, Marcus wasn't finished. He began to start slashing everyone, starting with his father, resulting in his second death.
"Marcus, stop, that's enough, you won!" Satan called.
"Oh, no, master," Marcus replied in a lower-pitched growling voice. "I'm just getting started."
As Death couldn't bear to see Marcus kill his remaining family members, Stewie began to shed tears of grief.
"Oh, this is all my fault," he regretted. "If I hadn't destroyed my time machine, none of this would have happened." Marcus slashed at Barbara; it was her second death. "Well, I wish..." Marcus then slashed at Vinny; his death. "I wish..." Marcus then slashed Briana and Ollie; their deaths. Now he was aiming for Jenny. "I wish I'd never destroyed my time machine!"
Just as Marcus was about to slash Jenny, there was a tapping sound, followed by a bathing of white light, engulfing everyone in its path.
When the light subsided, Stewie opened his eyes and saw that he was back in his bedroom. He held a hammer in his arms, and was near his time machine; it was in one piece again.
"What...?" Stewie started wondering. "I'm back in my bedroom. And my time machine, it's in one piece again. But how?"
"It was me, Stewie."
Death got the baby's attention.
"I should be ashamed of myself for taking Jenny and Marcus away from your family in the first place, I'm very sorry. And because I wouldn't want to make you or your family suffer, I decided to send you to the night you destroyed your time machine."
"You...you did this for me, Jenny and Marcus?" Stewie asked tearfully.
"I did, and in doing so, prolonged Jenny's life. Unfortunately for me, it was the wrong thing to do."
"What do you mean?"
"See for yourself."
Death let Stewie see that he was disintegrating. His bones began to fall apart, starting with his right fingers.
"Oh, my God," Stewie feared. "Death. You're dying!"
"Yes, Stewie," Death replied. "This is my punishment for saving your family's lives, including those of Brian and Barbara's. It was the only way to prevent their deaths from happening."
"So, what's going to happen now?" Stewie asked. "Barbara will never know about her having a brother."
"I'm sure she'll figure it out sometime," Death assured. His left foot and leg began to fall apart. "And since our timeline will no longer exist because of your decision not to destroy your time machine, I've decided to prolong your life long enough inside this timeline's Stewie's body."
"You mean, like the reset button on a video game system?"
"Exactly, Stewie."
Stewie thought about it. "Okay, Death. I won't destroy my time machine."
"That's the spirit, Stewie, though you're going to be aware of the consequences if you alter time."
"Believe me, Death. I already am aware."
"Good." With that, Death began to fade away, as did his remains. "This timeline's version of me will still be alive, though. But by the way, Stewie, keep a close eye on Jenny and Marcus, and be sure to let Brian know that he's going to become a father all over again."
Stewie smiled sadly at Death. "It's all right, Death," he said. "I'm sure Barbara can wait a little longer before Jair and Matt are properly born."
"Very well," Death understood. "This timeline's Death will let God know to lengthen the waiting time for the second litter. Goodbye, Stewie, and Merry Christmas."
With that, as Death was about to die, he faded away from existence, leaving a sad but happy Stewie alone.
"Hey, who were you talking to in here?"
Brian had gotten his attention. He and Barbara had entered the bedroom.
Stewie ran to the two dogs and gave them a hug, shedding tears of joy.
"Oh, Brian, Barbara," he said, exuberantly, "you don't know how happy I am."
"What's gotten into you, Stewie?" Barbara asked, confused.
"I'll tell you about it later, Barbara."
