Jon found it to be a strange feeling to be so different, in the body of a woman and having changed the truth to make him and his dad women. But he wondered. If his dad was a woman only a few years older than him, was his dad even his dad any more? How could Jon even exist if his dad isn't anyone's dad? Even adoption wouldn't explain it, because their ages were close enough that adoption didn't make any sense.
Jon's "dad" came up the stairs. She was about to pass by Jon but hesitated. Maybe she was trying to look in the mirror but then decided to just use one that wasn't occupied? Still, her presence there was an opportunity. Jon turned to the blonde woman and said "You won't mind answering a few questions. They won't seem strange to you."
His dad agreed. "Of course they won't."
"Okay. Tell me who you are and how you're related to me, or how we know each other."