So who is my mom?

Jon watched his mother-turned-father cook in the kitchen. His ex-mother didn't notice anything wrong at all, until he realized that Jon was staring at him. "Jon, is something wrong? Do you want to talk about something?" "Uh, no," said Jon, unsure of what to call his ex-mother. He turned away from him - the novelty had already worn off - and looked at a family portrait. "Oh no ..." "Jon, you sure you're okay?" *I said that too loud,* thought Jon. "Um, yeah." He couldn't get what he had just seen out of his head. In the picture were ...