i, a daughter?

suddenly information about his condition appeared in Jon's mind.
He realized that when he wanted Sarah to never exist he actually made Sarah's father never met Sarah's mother, and that His mother fell in love with Sarah's father instead of his real father, creating a new timeline.
"shit, i screwed myself, i better find Karyn and find a way to revert this"
the next day, at the school, Jon (wearing the girl's school uniform) went straight to Karyn and said "Karyn, help me please, i screwed badly things this time"
"Oh, Jenny, what happened now?"
"don't you find strange that i'm a girl now?"
"don't tell me that.."
Jenny told her that when he wished that the girl Sarah have never existed he re-wrote the history, making their parent get married, and all the stuff, like him being a boy and that Sarah girl being a doll of Karyn's collection
"that makes sense" said Her, "now let's think a way to fix this" answered Jenny