Audio problem: In the scene when he goes back to his home and finds his dad on the floor, he walks into the house and you can see Family Guy playing on the tv and hear it very quietly. Unfortuanately, the audio is coming from a completely different scene in the episode than the video. (You can see Lois is in the zoo, which comes from the beginning of the episode, yet the conversation you can hear is when they are sat in the kitchen towards the end of the episode.)
Audio problem: When David teleports to the clock face of Big Ben in London, the clock strikes the hour. Yet the clock hands show half past the hour.
Chosen answer: It's certainly not out of the question. That being said, Sophie is only David's half-sister, as they have different fathers, so if the jumper traits came from David's father, or from some genetic combination of his parents, then Sophie would not share his abilities.
Tailkinker ★