Rogue proved herself heroic, or at least nobler and kinder than the average villain, after only her first 2 or 3 appearances. She proved herself worthy of the team to Wolverine's satisfaction on their first adventure, as shown on the previous page, and saved the lives not only of Wolverine and Mariko, but, in relatively quick succession, Cyclops, Xavier, and Storm.
Still, there remained some lingering doubts about her loyalties.
She cottoned to her new adoptive family, yes, but, what would happen if an attack came, not from neutral villains, but her old adoptive family?
Readers did not have to wait long for an answer; the Brotherhood of Evil Mutants launched a 2-pronged attack against the X-Men just weeks after Rogue's "adoption" ...