Doctor Who spacetime described in physics paper

[MarjaE]

Just like the twins, the wormhole mouth which journeyed in space will be younger than the mouth which stayed at home. Thus, if you were to throw a baseball at the gardener’s mouth, it would emerge from the astronaut’s mouth at an earlier point in time. (p. 7)

I think that’s backwards. Shouldn’t it emerge from the astronaut’s mouth when that mouth is as old as the gardener’s mouth? Which would be later. If it were going the other direction, then it would be earlier.