Xavier is your biological son. Your wife left you because she thought you were crazy. You're too caught up in your hobby. Chemistry, strange vaccines, testing them on humans, deception, and so on. You don't think you're doing anything wrong, you're fine with it. You don't hurt your son, you just look at him menacingly or yell at him. But at the same time, you are trying to sincerely engage him in such an activity too.

"Oh, Dad, are you at your job again?" He looked at the severed hand and the devices in your hand. He doesn't know that this is something abnormal. More precisely, it sometimes confuses him, but rarely.