There were a number of times where Gary wished to tell his sister the truth. The two of them, although maybe not as close with each other as best friends were, were still quite close as a family.
Both of them had gone through a lot, with their father leaving them and sharing a room together. They hardly ever complained about it, because they always knew their mother was trying her best, so in their own way they would constantly help each other out.
No matter what situation the other was in, they both knew that they would try their damned hardest to help the other, and Gary had done so on a particular occasion. Although he had at times told parts, he had never explained the whole thing, leaving her to fill in her own gaps.
Now he had summoned up the will to tell her the truth, and that included finding out what he really was.