You have one last question that you shout before she leaves the door way... "You are one of those nice witch, right?"
"Yes. Were you afraid I would turn you into a frog or something, sis?"
Rather than answering, you continue to inquire. "I... Am I a witch too?"
"Yes." Automatically answer your sister, thanks to your new power, before she worriedly ask "Are you okay Coleen?"
"I don't know," you honestly answer. "Is there any one else around that could have distorted my memories? Because I remember being a magicless boy named Colin."
Somehow, the fact Jane couldn't answer immediately stopped the power you were given the day before and forgot about from working. Normally, each time you ask a yes-or-no question, it is instantly answered by yes before reality rewrite itself to make it true. "Beside the two of us? Not as far as I know. And even if there was, who would do this to you and why?"
"Wait, only the two of us can rewrite memories?"
"Yes."
"Isn't mom a witch too?"
"Yes, mom is a witch. But there is only two in the whole world that can alter memories: Us."
"Reassure me, we can't have done it accidentally? Adding, erasing or altering memories is something extremely complicated and demanding?"
Again, because of the rules of your ‘yes power’, Jane only answered your second question. "Yes. There is no risk of us inadvertently changing your memories."
"Maybe it's the after-effect of this strange dream I can't remember…" Trying to comfort the two of you.